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AGRONOMIC PERFORMANCE OF THE F1, F2 AND F3 GENERATIONS OF RICE CROSSES Taiwan Agricultural Research Institute
W.L. Chang; E.H. Lin; 張萬來; 林恩輝.
[[abstract]]The performance of grain yield, days to heading, plant height, and number of panicles per hill was evaluated in the F1, F2 and F3 generations of early maturing japonica, indica, and late maturing japonica crosses at the Chiayi Agricultural Experiment Station over the 3-crop period from the second crop of 1970 to the second crop of 1971. The mean F1 yield of all 21 crosses was 6.7, 12.9, and 19.2% greater than the higher parent, mid-parent and check variety, respectively. The F2 yield, relative to the higher parent, mid-parent, and check variety was 95.6, 101.4, and 111.9%, respectively. The average percentage of decrease of heterosis for grain yield from F1 to F2 was 6.4%. The mean F3 yield of 10 late maturing japonica crosses was 93.4, 99.0...
Palavras-chave: [[classification]]14.
Ano: 1972
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CHEMICAL WEED CONTROL IN TRANSPLANTED WINTER RICE IN SAUDI ARABIA Taiwan Agricultural Research Institute
W.L. Chang; C.C. Chiu; W.S. Chen; Mohammed Al-Arfage; 張萬來; 邱建中; 陳文雄; 穆哈默德.阿爾華吉.
[[abstract]]Four granular and two liquid herbicides were tested in transplanted winter rice in the Al-Hassa Oasis. Among granular herbicides, benthiocarb-M and butachior gave better control of weeds with no sustained injury to rice while nitrofen and MO-401 did not perform effectively under local conditions. Both liquid herbicides, propanil and benthiocarb, also provided adequate control of weeds but caused more crop damage than the granular herbicides. More economical control of weeds in transplanted winter rice in Saudi Arabia appears likely with the use of herbicides. 本文係報告四種粒劑及兩種乳劑除草劑在Al-Hassa綠洲冬季移植稻田之治草試驗結果。在粒劑除草劑中,掃丹-M與馬上除兩種之藥效較佳,又無明顯藥害,惟多谷與益歐粒劑之表現則欠理想。思登與掃丹乳劑之治草效果亦佳,惟其藥害亦較嚴重。初步結果顯示沙烏地阿拉伯冬季移植稻田之經濟使用除草劑似屬可能。
Palavras-chave: [[classification]]14.
Ano: 1976
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COMPARATIVE STUDY OF WEED CONTROL METHODS IN RICE Taiwan Agricultural Research Institute
張萬來; W.L. Chang.
[[abstract]]嘉義農業試驗分所與國際稻米研究所合作,於民國 53 年第二期作舉辦水田殺草劑治草試驗,應用十三種不同配合之殺草劑,從事水田治章效果觀察,玆將初步所得結果,簡述於後: Ametryne與Simetryne殺草效果最佳,尤對紫背浮萍,青萍及田字草等水生濶葉雜草,具有特效。惟一般殺草劑對大株雜草效果較差,Propanil在本試驗之治草效果最差。 Ametryne,PCP與Simetryne對水稻毒害較強,MCPCA有抑制水稻發育現象,僅Propanil和Swep對水稻未有毒害作用。 水稻生育初期,稻田雜草大都為水生濶葉草,中、後期則以稗草類之雜草為最多,水生濶葉草在水稻生育後期逐漸自滅,故收穫前所得雜草乾重以稗草所佔比例最大,而三稜葱草,鴨舌草及水蜈蚣等所佔比例較少。 雜草叢生可促進水稻抽穗,但對每穗粒數似有減少之趨勢,水稻受殺草劑強性毒害則延遲抽穗。殺草劑可抑制水稻生育早期之株高及分蘗,但不影響穗長,千粒重。 DBN , MCPCA , PCP , Swep , Simetryne , Hydram 以及 Swep + MCPA 處理區稻谷產量超過慣行除草區。 DBN 處理區每公頃產量較慣行除草區多出 563 公斤(12%)比不除草區高1,320公斤(34%),後者差異達1%顯著值,不除草處理比慣行除草者減產757公斤達19%,其差異遠超5%顯著水準,由此概見水田雜草為害,使稻谷減產之一斑。 Ametryne 因具有強性毒害,致使部份水稻被害,呈顯缺株,其產量乃受影響。 Field investigation was made on the second crop (wet season) of 1964 at Chiayi Agricultural Experiment Station...
Palavras-chave: [[classification]]14.
Ano: 1965
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Dapog秧苗生產力之初步觀察 Taiwan Agricultural Research Institute
張萬來; W.L.Chang.
[[abstract]]嘉義農業試驗分所為明嘹Dapog秧田在本省推廣之可能性,於民國56年第二期作設置該秧田育苗,觀察其在秧田及本田之表現並與本省推廣之標準改良秧田(對照)比較。本試驗初步結果顯示Dapog秧苗之苗高,每苗葉數均較改良秧田者為小,但是其每苗根長,根數却大於改良秧田。在本田發育初期,Dapog區之株高,每株分蘗均小於對照區,惟在成熟期,兩處理之株高,每株穗數相若而Dapog秧田區之每株穗數稍高於對照區。Dapog區之生育日數長於對照區,相差極為顯著。就每公頃乾淨谷之產量而言,Dapog區高達4,712公斤,較對照區增產3.4%。由於Dapog秧田可節省勞力,又可縮短秧田日數,其秧苗生產力亦不亞於本省之改良秧田育成之秧苗,故若經試驗改良後,在本省第二期作似有採用之價值。 Dapog”seedbed extensively practiced in Southern Luzon and the Bicol regions of the Philippines was tried in the second crop of 1967 at the Chiayi Agricultural Experi-ment Station, and the performance of its seedlings was compared with those of the standard“Improved”nursery or semi-irrigated nursery commonly practiced in Taiwan n both the nursery and the paddy field. The preliminary observation showed...
Palavras-chave: [[classification]]14.
Ano: 1968
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EFFECT OF A NEW HERBICIDE, R-3552, ON THE CONTROL OF BARNYARD GRASS IN THE RICE NERSERY Taiwan Agricultural Research Institute
W. L. Chang; 張萬來.
[[abstract]]The effect of R-3552 on the control of barnyard grass in rice nursery evaluated in the second crop of 1968 was briefly summarized. R-3552 was found to be highly effective in controlling three biotypes of Echinochloa crusgalli at dry, wet, and flooded nurseries in both pre- and post-emergence applications. No phytotoxicity of R-3552 to rice seed-lings was detected. R-3552經於民國57年第2期作試驗結果,發現在旱秧田、飽水秧田、及浸水秧田,無論在裨草發芽前或發芽後使用,對三種形態不同之稗草均具良好防治效果,且對秧苗未具藥害作用。
Palavras-chave: [[classification]]9.
Ano: 1969
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EFFECT OF GROWING CONDITIONS ON YIELD AND COMPONENTS OF YIELD IN RICE Taiwan Agricultural Research Institute
W.L. Chang; S.C. Yang; 張萬來; 楊遜謙.
[[abstract]]The effects of 2 fertilizer rates, 3 planting densities, and 3 shapes of planting on the growth of rice conducted in the second crop of 1963 and the first crop of 1964 at Chiayi Agricultural Experiment Station are reported. Grain yields increased with increasing fertilizers and planting densities. The increase of yields was more pronounced in the first crop of rice. Differences in yields between fertilizer rates as well as among planting densities were not signifi-cant except in planting density of the first crop, 1964. Square shape of planting outyielded the other two rectangular shapes, a difference greatly exceeding the 1% level of probability in both crop seasons. Number of panicles per hill slightly increased with added fertilizers,...
Palavras-chave: [[classification]]14.
Ano: 1965
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EFFECT OF KNOXWEED ON THE CONTROL OF WEEDS IN PADDY RICE Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]Several combinations of Knoxweed (Eptam + MCPA) were evaluated for their weed control effect at the Chiayi Agricultural Experiment Station in the first crop of 1968. All treatments of Eptam + MCPA were found to be highly effective in controlling weeds in paddy rice and its effect was found to last more than 8 weeks after the application of this chemical. However, Eptam+ MCPA caused severe phytotoxicity to rice. Rice toxicity was found to be related to the rate of MCPA, the higher the MCPA rate, the heavier the rice toxicity. As a result, grain yields of all Eptam + MCPA treatments were 12.1 to 29.3% lower than that of hand weeded check. 有效成份含量不同之Knoxweed若干種經本分所於57年第一期作水稻田試驗結果,發現不同成分之處理均具優良之治草效果,但因對水稻之藥害極為嚴重,其每公頃稻谷產量僅達人工除草區之71~88%。
Palavras-chave: [[classification]]14.
Ano: 1968
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EFFECT OF SOIL TREATMENT ON THE EMERGENCE AND GROWTH OF WEEDSAND RICE Taiwan Agricultural Research Institute
W.L. Chang; C.P. Mao; 張萬來; 毛振鵬.
[[abstract]]Preliminary results on the emergence and growth of weeds and rice as affected by the burning of soil obtained at the Chiayi Agricultural Experiment Station in the first crop of 1972 are reported. The germination and early growth of Echinochloa crusgalli were not affected by the burning of the soil while Monochoria vaginalis and Cyperus difformis showed poor germination and growth on the burned soil. Rice variety Taichung shen 2 germinated poorly and developed severe seedling disease on the untreated soil but seed germination and seedling growth were apparently normal on the burned soil, although there was evidence of slight suppression on the seedling height....
Palavras-chave: [[classification]]14.
Ano: 1972
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EFFECT OF SPLIT APPLICATION OF FERTI LIZER ON YIELD, COMPONENTS OF YIELD, AND OTHER AGRONOMIC CHARACTERS OF RICE (V) Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]The effect of time of nitrogen application on grain yield, its components, and some agronomic traits of rice evaluated in both crops of 1967 at the Chiayi Agricultural Experiment Station are reported. The application of nitrogen at panicle formation stage did not make itself felt in the first crop, however, it was highly effective in the second crop. The increase of yield appeared to be due largely to the increase in number of grains per panicle and weight of 1,000 grains. Top-dressing of nitrogen at heading stage did not contribute to the incre-ase of grain yield. Time of nitrogen application did not affect heading date, but maturity date was significantly delayed by application of nitrogen at heading stage. The nitrogen applicat-ion at...
Palavras-chave: [[classification]]14.
Ano: 1968
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EFFECT OF SPLIT APPLICATION OF FERTILIZER ON YIELD, COMPONENTS OF YIELD, AND OTHER AGRONOMIC CHARACTERS OF RICE (IV) Taiwan Agricultural Research Institute
W.L. Chang; S.C. Yang; J.N. Chao; 張萬來; 楊遜謙; 趙政男.
[[abstract]]The effects of time of fertilizer application on yield, components of yield, and some important agronomic characters of rice evaluated in 1965 at the Chiayi Agricultural Experiment Station are summarized. Treatment C with nitrogen fertilizer top-dressed at maximum tillering stage and treatment F, at both maximum tillering and panicle initation stages produced the highest yields in both crops. The yield increases appeared to be due largely to the increase of panicles per hill. Top-dressings of nitrogen fertilizer before maximum tillering stage did not contribute to yield increase. The effects of applying nitrogen fertilizer at heading stage and split application of potassium fertilizer were not evident in this experiment. Early application of...
Palavras-chave: [[classification]]14.
Ano: 1967
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EFFECTS OF PLANTING DENSITY ON YIELD COMPONENTS OF RICE Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]Experimental results of two rice varieties, Chianung 242 and Chianan 8, planted at two spacing treatments in the first crop of 1964 at Chiayi Agricultural Ex-periment Station are reported. Grain yield per hill decreased with increased population density, with Chianan 8 decreasing at a higher rate than Chianung 242. However, per unit area grain yield increased in Chianung 242, while that of Chianan 8 decreased at higher population density. A similar trend prevailed also in number of panicles per hill. Number of grains per panicle decreased whereas 100-grain weight increased at higher population density. The relationships among the 3 variables changed with spacing. Number of panicles per hill was positively associated with grain yield per hill,...
Palavras-chave: [[classification]]14.
Ano: 1965
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EFFECTS OF SPLIT APPLICATION OF FERTILIZER AND PLANTING DENSITY ON YIELD, COMPONENTS OF YIELD AND OTHER AGRONOMIC CHARACTERS OF RICE Taiwan Agricultural Research Institute
W.L. Chang; S.C. Yang; 張萬來; 楊遜謙.
[[abstract]]A panicle-type Japonica variety of rice Chianung 242 was subjected to two methods of fertilizer application namely, conventional and split methods, and two levels of planting density, 64 hills and 96 hills per Pen (3.3 m2). The experiment was arranged in split plot design with methods of fertilization as main treatments and planting densities as sub-treatments. The experiment was replicated 4 times on the Experimental field of Chaiyi Agricultural Experiment Station in the second crop of 1963. Data on grain yield, components of yield and other agronomic characters were taken to determine the effect of both treatments as well as their interactions. Split application of fertilizer was found to produce higher yield than conven-tional method of...
Palavras-chave: [[classification]]14.
Ano: 1964
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EFFECTS OF SPLIT APPLICATION OF FERTILIZER AND PLANTING DENSITY ON YIELD, COMPONENTS OF YIELD, AND OTHER AGRONOMIC CHARACTERS OF RICE (Ⅲ) Taiwan Agricultural Research Institute
W.L. Chang; S.C. Yang; 張萬來; 楊遜謙.
[[abstract]]The effects of 3 split applications of nitrogen and potash fertilizers and 2 planting densities on yield and some agronomic traits evaluated in the second crop of 1964 and the first crop of 1965 at Chiayi Agricultural Experiment Station are reported. Split fertilizations generally outyielded conventional one in both crop. The yield increase appeared to be due largely to the increase in either number of grains per panicle or grain weight. Grain yield was also increased by close spac-ing which was attributable to increase in the number of panicles per unit area. An evidence of interaction between fertilization and planting density was detected for grain yield in this experiment. The weight and length of panicles were significantly increased by...
Palavras-chave: [[classification]]14.
Ano: 1966
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EFFECTS OF SPLIT APPLICATION OF FERTILIZER AND PLANTING DENSITY ON YIELD, COMPONENTS OF YIELD AND OTHER AGRONOMIC CHARACTERS OF RICE (II) Taiwan Agricultural Research Institute
W.L. Chang; S.C. Yang; 張萬來; 楊遜謙.
[[abstract]]The rice variety, Chianung 242 was subjected to 4 levels of fertilization and two levels of planting density arranged in a 4×2 factorial oxperiment with four replications. The experiment was conducted at Chiayi Agricultural Experiment Station in the first crop of 1964. Data on grain yield, components of yield and several other agronomic characters were taken to analyze the effects of the treat-ments as well as their interactions. Split fertilizaions generally produced higher yields than conventional one, a difference exceeded the 5% level of probability. The yield increase appeared to be due largely to the increase of panicles and grains. Responses of grain yield as well as other agronomic characters measured to the split application of...
Palavras-chave: [[classification]]14.
Ano: 1964
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Effects of Varietal Type and Crop Season on the Performance of Some Granular Herbicides in Transplanted Rice Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]The effects of varietal type and crop season on the performance of some granular herbicides in transplanted rice evaluated at the Chiayi Agricultural Experiment Station, Chiayi, Taiwan, in the first and second crops of 1970 are reported. The major weeds of the experimental pots were Monochoria vaginalis and Cyperus difformis but Echinochlna cusglli occupied only a small fraction of the total weed population. The number of weeds in the plots of Chianung 242 was more than that of Taichung native 1 while the growth of Chiaung 242 when it was rated at panicle initation stage. Most herbicides gave similar control of weeds in the second crop was better than that of the first crop. Granular herbicides tested in this experiment generally provided...
Palavras-chave: [[classification]]14.
Ano: 1971
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INFLUENCE OF PLANTING METHODS ON THE VARIABILITY AND CORRELATIONS OF AGRONOMIC CHARACTERS IN THE F2 POPULATIONS OF A JAPONICA RICE CROSS Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]Spaced and bunch plantings of F2 plants of a cross between two japonica rice varieties, Choung-Chin-Chiu and Chianung 242, together with their space-planted parents, were arranged in randomized complete blocks to evaluate genetic and environmental variability of the segregating F2 populations. Data recorded on each plant were heading date, plant height, number of panicles per plant, number of grains per panicle, length of panicle, weight of panicle, weight of 100 grains, and grain yield per plant. Heritability values for each character and correlation coefficients between characters were calculated. Path-coefficient analysis was made to show the interrelationships of components of yield with grain yield per plant. Bunch planting greatly reduced...
Palavras-chave: [[classification]]14.
Ano: 1964
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INFLUENCE OF SPACING ON HERITABILITY AND INTERRELATIONSHIPS AMONG AGRONOMIC TRAITS IN THE F2 POPULATION OF A RICE CROSS Taiwan Agricultural Research Institute
W.L. Chang; 張萬來.
[[abstract]]Eight agronomic traits of a rice cross, Tainae 3 × Pi No. 4, were studied in in the F2 population in the second crop of 1965 to 3 spacings, i.e., wide, standard, and close spacings with distance between rows and hills of 25 × 40, 25 × 20, and 25 × 10, respectively. Data for all traits were obtained on individual plants randomly selected. Close spacing caused a drastic decrease in panicles and grain yield per plant whereas plant height, panicle weight, and grains per panicle decreased very slightly. Heading date and weight of 100-grain were practically not affected by spacing. Estimates of heritability for panicles and grain yield per plant were low largely due to the low genotypic variance of F2 population. Heritabilities for other traits were...
Palavras-chave: [[classification]]14.
Ano: 1967
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INFLUENCE OF STRAW ASHES ON WEED CONTROL EFFECT OF HERICIDES IN RICE Taiwan Agricultural Research Institute
W.L. Chang; C.P. Mao; 張萬來; 毛振鵬.
[[abstract]]The influence of straw ashes on the weed control effect of some granular herbicides in rice was evaluated at the Chiayi Agricultural Experiment Station in the first crop of 1972. The incorporation of straw ashes into paddy soil reduced considerably the weed control effect of Saturn, TOK ,and MO-401 but not that of Machete. The application of straw ashes affected primarily the initial weed control effect of herbicides sensitive to straw ashes. The control of Echinochloa crusgalli was most severely affected by straw ashes which was followed by Cyperus difformis but Monochoria vag-inalis was not affected....
Palavras-chave: [[classification]]6.
Ano: 1973
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INHERITANCE OF RESISTANCE TO PHYTOTOXICITY OF PHENYL MERCURIC ACETATE IN RICE Taiwan Agricultural Research Institute
W.L. Chang; J.N. Chao; 張萬來; 趙政男.
[[abstract]]The inheritance of the marked differences between rice varieties in response to phenyl mercuric acetate (PMA) dust was investigated in the first crop of 1966 at the Chiayi Agricultural Experiment Stations. The resistant japonica-type variety, Chianung 242, was crossed with a sensitive indica variety, Taichung Native 1, and their F1, F2, BC1, and BC2 plants were used in the testing. The individual seedlings or plants were classified for resistance to PMA toxicity based on an arbitrary scale devised by the authors. The observed data agreed with the hypothesis that sensitivity to PMA toxicity is controlled by at least two pairs of alleles, Prna1 and Prna2. The possible implication of tolerance to PMA toxicity on the future rice breeding program is...
Palavras-chave: [[classification]]14.
Ano: 1966
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MANIFESTATION OF HYBRID VIGOR IN RICE Taiwan Agricultural Research Institute
W.L. Chang; E.H. Lin; C.N. Yang; 張萬來; 林恩輝; 楊建南.
[[abstract]]The manifestation of heterosis for grain yield, yield components and several important agronomic characters by a group of 265 F1 hybrids of rice over a six-crop period from the second crop of 1967 to the first crop of 1970 are reported. Among 265 F1 hybrids evaluated, a total of 192 or 72.5% of the total hybrids outyielded their mid-parent and check varieties while grain yield of 145 or 54.7% of the hybrids exceeded their respective high-parent. The average heterosis for these outstanding F1 hybrids was 20.3, 19.1 and 18.3% in relation to mid-parent, check varieties and high-parent, respectively. However, the magnitude of hybrid advantage over the mid-parent and check varieties reduced to 10.6 and 6.3% respectively when the average data of the...
Palavras-chave: [[classification]]14.
Ano: 1971
Registros recuperados: 45
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