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Registros recuperados: 327
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2-Amino-4-chloro-6-methylpyrimidine抑制氮肥硝酸化作用之研究(第1報) Taiwan Agricultural Research Institute
溫西濱; H.P. Wen.
[[abstract]]本試驗之目的為探討2-Amino-4-chloro-6-methylpyrimidine(簡稱AM)之施用對于水稻產量之影響,及對土壤中硝酸化作用之抑制效果,於1966年間採用直播栽培法舉行水稻盆栽試驗,並在實驗室內分析土壤中之NH3-N和NO3-N生成量,以究明所施尿素之銨化及硝酸化情形,測定AM之硝酸化抑制效果。 據盆栽試驗結果AM之施用對于稻谷之增收確有效果,土壤實驗結果示AM對尿素之銨化作用並無影響,但對其硝酸化卻有顯然抑制效果。 由以上結果可以推知AM在容易發生脫氮作用之環境下(如輪流灌溉地區或缺水地區水稻直播栽培)對于氮素肥料肥效之增進將有裨益。但實際應用效果如何尚待繼續試驗。 To test the effect of 2-Amino-4-chloro-6-methyl pyrimidine (A.M.) as a nitrifica-tion inhibitor in soil and its applicability in rice culture, a pot experiment under which loss of nitrogen by percolation and denitrification prevailed was conducted. A. M. was observed not to affect the rate of ammonification of urea, whereas the nitricfication was significantly suppressed by A. M. and the availability of the fertilizer applied for the plant was highly...
Palavras-chave: [[classification]]4.
Ano: 1967
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A Comparative Study on the Behavior of Nutrient Uptake between Jute (Corchorus capsularis) and Kenaf (Hibscus cannabinus) Taiwan Agricultural Research Institute
C.F. Lin; 林家棻.
[[abstract]]Jute, Hoowae blue No.7 and kenaf, Madras red, were grown at the different rates of fertilization and a study. was made on the different behaviors. in the uptake of nutrient elements between them. Pot culture with the same treatments was also conducted so as to collect the shedded leaves during growth and the nitrogen content in leaves between jute and kenaf was compared. The dry matter content both of jute and kenaf increased significantly with the increasing rate of fertilization up to a certain level, beyond which, however, an increased supply of fertilizers was unaccompanied by further striking increase in plant growth. The optimum nutrient level is likely to be less for kenaf than for jute. Both in jute and kenaf, the percentage of nitrogen...
Palavras-chave: [[classification]]4.
Ano: 1955
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A PRELIMINARY NOTE ON THE PHOTOSYN THETIC RATE OF I-GEO-GEN LEAF IN RELATION TO THE RED DISCOLORATION UNDER LOW TEMPERATURE Taiwan Agricultural Research Institute
S. Lian; 連深.
[[abstract]]To test if the red discoloration of leaves usually observed in I-geo-gen is related to low temperature and also if the photosynthetic rate and the grain yield are adversely affected by the discoloration, a pot experiment was conducted. Rice varieties, I-geo-gen and Yükara, were grown in a greenhouse at 25-40°C. At about maximum tillering stage, two temperature treatments, i.e., 13-20°C and 25-40°C (normal) were differentiated. These pots were returned to the normal temperature after eleven-day treatments. The apparent photosynthetic rate was then measured on certain intact leaves to see the effect of temperature treatment. Significant red discoloration of leaves and also a decrease of apparent photosynthetic rate were observed in J-geo-gen...
Palavras-chave: [[classification]]4.
Ano: 1972
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A Strategy to Maximize Maize Production while Reducing Nitrate Contamination to the Environment Taiwan Agricultural Research Institute
Chia-Yin Tsai.
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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An Experiment on The Method of Application of Urea on Rice Taiwan Agricultural Research Institute
L.T. Lee; S.M. Hsu; C.T. Lin; K.C. Lin; 李蘭帝; 許新民; 林金燦; 林國謙.
[[abstract]]1. An experiment on the method of application of urea, in which time of irrigation, placement of urea, and time of top dressing are concerned, was conducted during 1955 for two crops in seven localities. 2. Some laboratory tests consisting of general anlalysis of the soils, determination of the rate of decomposition of urea and of amount of ammonia evaporated by application of urea are also carried out. 3. Deep placement and top dressing are found significantly effective to increase the yield of rice, however, the effect of the time of irrigation is still in question and more elaborate experiments should be needed to bring it to light. 4. Most of the urea applied in the soils of the experimental localities will decompose within 3 to 5 days, and...
Palavras-chave: [[classification]]4.
Ano: 1957
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An Experiment on the Method of Application of Urea on Rice. Taiwan Agricultural Research Institute
L.T. Lee; C.T. Lin; K.C. Lin; S.C. Hsu; 李蘭帝;林金燦;林國謙;徐水泉.
[[abstract]]1. Irrigation within 6 days after the urea application has no significant influence on its availability so long as the deep placement is concerned. 2. Deep placement is the most essential in the application of urea, particulerly when the irrigation has been delayed. 3. Part of the urea used in top-dressing once or twice 20-40 days after the transplantation may increase the paddy yield significantly, neverthless, mixing with soil is not to be overlooked. 4. Balling the urea with some clay soil (urea soil, 175:1000) is the most effective method of application which increase the paddy yield by about 9% as a general average. 5. Urea does not differ greatly from the ammonium sulphate in its availability, however, in some experimental data, ammonium...
Palavras-chave: [[classification]]4.
Ano: 1960
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Calcium-45 mobility in young apple trees grown under different nutrient-calcium conditions Taiwan Agricultural Research Institute
Tsai Fua Chiu; 邱再發.
[[abstract]]Root-applied 45Ca was readily translocated to leaves of normal-Ca trees but was less readily translocated to leaves of high-K or low-Ca trees. Calcium-45 accumulated to a much greater extent in roots and stems of the latter than in the former trees. Root-applied 45Ca was translocated much more readily to apical young leaves than to basal old leaves of growing shoots. Shoot-applied 45Ca was rapidly translocated to all leaves of excised shoots through the xylem transpiration stream. Calcium-45 applied to trees at the later stages of fruit development scarcely entered the fruit but accumulated strongly in the leaves of the fruit truss, and especially in the attachment point of the fruit (future abscission zone). The general nutritional status of...
Palavras-chave: [[classification]]4.
Ano: 1980
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Country policy profile for Papua New Guinea forwards sustainable agriculture development Taiwan Agricultural Research Institute
Vele Kagena.
[[abstract]]The agriculture sector remains the main stay of PNG¡¦ economy especially he we rural economy. While significant pockets of pure subsistence griculture do exist, the livelihood of the majority of the rural population is ;upported by semi-subsistence agriculture which comprises traditional ;ubsistence gardens that provide the basic needs for the family and small-scale ommercia1 agriculture that provides the family with cash income. In terms of ts direct impacts at the livelihoods of the majority of Pupua New Guinea, ;emi-subsistence agriculture is the most important economic sector. It sustains he livelihood of the 85% of the population of the 5.1 million people residing in ural areas and engaged in a mixture of cash cropping and subsistence...
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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Effects of Different Soil-water-fertilizer Management Practices on Tagged Fertilizer N Uptake by Rice in Amazon Varzea and Sacramento Clay Taiwan Agricultural Research Institute
C.H. Wang; 王接皇.
[[abstract]]Using 15N-tagged ammonium sulfate fertilizers as tracers, the uptake of fertilizer N by rice (Oryza sativa L.) as influenecd by different soil-water- fertilizer management practices in Amazon varzea soil and Sacramento clay were studied under pot culture conditions. Depending on the practices the recovery of fertilizer N by rice at flowering stage was 60 to 67% in the Amazon varzea soil, while this was 25 to 59% in the Sacramento clay. Those practices which may increase development of aerobic conditions or diffusion of the applied N to the oxidized soil layers greatly reduced the applied N uptake in the Sacramento clay. This was not the case in the Amazon varzea soil. The ammonium-N applied in the Sacramento clay was found to be quickly...
Palavras-chave: [[classification]]4.
Ano: 1986
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EFPECT OF CHEMICAL ELEMENTS ON THE GROWTH OF CROP PATHOGENS II. Effect of Hg-, Ni-, Sn-, Pb-, Fe-, and Al-Salts on Rice Blast and Sheath Spot Fungi Taiwan Agricultural Research Institute
S.C. Hsu; T.C. Dough; 徐水泉; 杜向彊.
[[abstract]]The effects of some inorganic saltes on the growth of rice blast and sheath spot fungi were investigated. Among the salts tested, HgCl2 shows the strongest fung-icidic effect. Nickel salts also has inhibitory effects on both fungi, but the effect decreases rapidly as the concentration is decreased. Ferrous- and lead-salts at 10-3 mol concentration inhibit slightly the growth of rice blast fungus, while Al- and Sn—salts show little effect. Aluminum- and lead- salts seem to affect the density of mycelium of sheath spot fungus, but Fe-and Sn-salts show no effect. In both [previous and [present experiments, chlorides are most effective for inhibiting the growth of both fungi. Fungicidal effects of the salts so far tested on rice blast fungus...
Palavras-chave: [[classification]]4.
Ano: 1964
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Field Experiment On Fertilizer Application In Citrus Orchards (First Report) Taiwan Agricultural Research Institute
T.F. Chiu; S. Lina; C.S. Hsu; 邱再發; 連深; 徐水泉.
[[abstract]]Field experiments on the fertilizer application in citrus orchards have been conducted in Sinpu and Yuanlin, the ponkan producing centers, since January, 1958. Five treatments 1. e., a) PK, b) NK, c) NP, d) NPK, e) NPK+Mg, Mn, Zn, were replicated four or five times in a randomized block layout to determine the effect of three elements as well as the trace elements upon fruit yields and the nutrient contents of leaves. The amounts of fertilizers dressed were based on the conventional application of the local farmers, and ammonium sulphate, calcium phosphate and potassium chloride were used as N, P, K sources respectively. Fruit yields and their number were recorded. Leaves were sampled five times in a year. The results obtained in the first year...
Palavras-chave: [[classification]]4.
Ano: 1960
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FLOW EQUATION AND ITS APPLICATION TO WATER MOVEMENT IN SOILS Taiwan Agricultural Research Institute
L.T. Li; 李蘭帝.
[[abstract]]I. EVOLUTION OF FLOW EQUATION Water always moves from higher potential site to lower potential site. The basic equation describing the relation between the velocity of flow and the potential difference is given by Darcy’s law, which is based on the experimental observation. The simplest example leading to Darcy’s equation is given in the follwing. In this case, it is one dimensional saturated flow. 本文敘述流動方程式(Flow Equation)的誘導及其在土壤水分移動之應用。在本文所舉之例子可解該方程式而知水分移動之情形。
Palavras-chave: [[classification]]4.
Ano: 1964
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INFLUENCE OF TEMPERATURE ON GASEOUS LOSS OF NITROGEN FROM SOME SOILS OF TAIWAN UNDER FLOODED CONDITIONS Taiwan Agricultural Research Institute
T.T. Yen; 顏滄濤.
[[abstract]]Experiments have been carried out in order to investigate the influences of temperature on gaseous loss of nitrogen and on changes in contents of ammonium and nitrate-nitrogen in some soils of Taiwan under flooded conditions. The soils used in the experiments are Taipei silt loam, Yilan silty clay loam, Pinchen loam, Yuanlin clay loam, Hsinying clay loam and Pintung silty clay loam. The soils are incubated at various temperatures under flooding conditions after adding ainmonium-nitrogen, and analyzed for nitrogen of various forms. The decrease of total nitrogen is regarded as the amount of gaseous loss of nitrogen. The following results are obtained: (1) In temperature range of 10°-30°C., gaseous loss of nitrogen, probably due to successive...
Palavras-chave: [[classification]]4.
Ano: 1964
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Integrated Agri-disaster Management for Sustainable Agricultural Development in China Taiwan Agricultural Research Institute
Youqi Chen.
[[abstract]]For China, sufficient food with good quality and better life for in 1.6 billion people in 2003 will be of the highest priority for sustainable agricultural development in a short and medium term. To achieve those goals, new technologies for management and rational utilization of agricultural resources, are of great significance. Chinese agriculture under the regime of sustainable development is suffering from natural disasters such as drought, flood and forest fire, etc. very seriously. So how to combat the disasters and to decrease the economic loss with the help from new technologies such as remote-sensing and GIS (geographical information system) has attracted more attentions fTom governmental officers and scientific researchers. Under the...
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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LIMING EFFECTS ON THE YIELD AND COMPOSITION OF PERENNIAL RYEGRASS TREATED WITH SEWAGE SLUDGE CONTAMINATED WITH HEAVY METALS Taiwan Agricultural Research Institute
C.F. Lin; J. Bolton; 林家棻; J. Bolton.
[[abstract]]Up to 12% of the dry matter of a sewage containing 0.65% Zn, 0.20% of Ni, 0.5% Cu, and 0.41% Cr was mixed with an acid loamy sand limed to give a pH range from 4.6 to 7.0 and cropped with ryegrass in pots. The results obtained were similar to a previous experiment (2). Yields of three cuts of grass were reduced by the largest amounts of sludge at soil pH’s less than 6. However, grass yields were increased by medium amounts (8%) of sludge at soil pH more than 6. The increases in yield were caused by increased supplies of N, P, Mg, and S from the sludge. Concentrations of more than 300 ug/g Zn, and 200 ug/g Ni in the grass dry matter were associated with lowest yields. The treatments had only small effects on Cu concentrations. Acetic...
Palavras-chave: [[classification]]4.
Ano: 1977
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Management of Plant Diseases without Using Pesticides in Sustainable Agriculture Taiwan Agricultural Research Institute
Wen-Hsiung Ko.
[[abstract]]In solving growers new plant disease problems during the past three decades, various control methods without using any pesticide have been discovered. Through the systematic exclusion of each possible causal factor, and the confirmation of the working hypothesis by experimentation, several kinds of disorders were found to be due to nutrient deficiency and were controlled by application of appropriate nutrients. These include boron deficiency as the cause of latex secretion and deformity of papaya fruit, deficiency in calcium and boron as the cause of heart rot of banana tissue culture plantlets, and deficiency in nitrogen and phosphorous as the cause of ohia forest decline. The same approach was applied to discover hydrogen fluoride emitted...
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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Multiple Cropping as a Strategy in Sustainable Soil Management Taiwan Agricultural Research Institute
Shan-Ney Huang.
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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PCP尿素對於水稻之肥效及除草效果試驗 Taiwan Agricultural Research Institute
溫西濱; H.P. Wen.
[[abstract]](l)本試驗為探討PCP尿素中含有之「PCP-Na」對於水田雜草之殺草效力及氮成分之硝酸化成抑制效力對水稻之生育,產量的影響,而在臺北、桃園兩地舉行田間試驗同時在實驗室內進行化驗分析。 (2)田間試驗結果PCP尿素對於水稻收量增產之影響較優於尿素,其原因可推定為「PCP-Na」之硝化抑制作用及殺草力之影響所致。 (3)PCP尿素之「PCP-Na」成分具有硝酸化成之抑制力同時對銨化作用有阻礙之傾向。 (4)PCP尿素施用過量時對農作物具有藥害作用,故其PCP-Na使用量每公頃10公斤左右較為適宜,在此範圍內水稻之生育初期雖受接觸藥害之影響,但至生育後期即可漸次恢復自然,不致影響稻谷產量。 (1) Field experiments were conducted at Taoyuan and Taipei areas to compare the fertilizer effect of PCP-urea with that of urea. The nitrification inhibitory effect of PCP-urea was also tested in the laboratory. (2) With the same rate of nitrogen, PCP-urea gave a slightly higher grain yield than urea in the experiment, which might be attributed to both the nitrification inhibitory and the weed controlling effect of PCP-Na cantained in PCP-urea. migh be...
Palavras-chave: [[classification]]4.
Ano: 1967
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PCP鈣氰氮化鈣對水稻之肥效及除草效果試驗(第一報) Taiwan Agricultural Research Institute
林國謙; 溫西濱; 王清演; K.C. Lin; H.P. Wen; C.Y. Wang.
[[abstract]]本試驗於民國五十一年在桃園、屏東兩地舉行田間試驗,其結果提要如下:由試驗結果觀之,PCP鈣氰氮化鈣在第一期作,若充為基肥施用時,其肥效雖接近硫酸銨區之收量,但半量氮素以PCP鈣氰氮化鈣充為基肥,餘半量氮素以硫酸銨充為追肥施用時,其肥效與硫酸銨施用區之收量相差無幾。在第二期作PCP鈣氰氮化鈣之肥效遠優於硫酸銨施用區,換言之,PCP鈣氰氮化鈣對水稻之增產效果,在第二期作較優於第一期作。 至於對除草效果而言,氰氮化鈣+五鈣酚鈉區,效果最優,PCP鈣氰氮化鈣區次之,氰氮化鈣區又次之,硫酸銨區最差。 就生育狀況而言,氰氮化鈣+五鈣酚鈉區及PCP鈣氰氮化鈣區兩處理生育初期雖受PCP之藥害而生育被抑制,但以後漸次恢復,至生育後期共生育狀況即遠超出其他各處理區。 The experiment was conducted in Taoyuane and Pintung for two crops in 1962. The result indicated that the availability of PCP-Calcium Cyanamide was corresponding to that of ammonium sulfate in the first crop and was even superior than the latter in the second crop. Besides its availability as a nitrogenous fertilizer, its effect on weeding was also significant. Though the early growth of paddy was a little effected by the...
Palavras-chave: [[classification]]4.
Ano: 1964
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Quality Management and Good Agricultural Practices Taiwan Agricultural Research Institute
María del Pilar.
[[abstract]]The peruvian agrarian vision is defined as following ¡§Organized farmers, competitive, profitable, social, economic and environmental sustainable, in a democratic context with equality of opportunities¡¨, according to the official governmental documents. This objective revisit great importance because near 50% of the active population depends on the agrarian sector and because our country is privileged in resources and biodiversity. For this, is a social and economies imperative to work harder, hand to hand with the private enterprise, the civil sector and the international cooperation to achieve the objectives. Actually, the Minity of Agriculture is seriously commitment to improve its role: normative, onentator, promoter and regulator. This...
Palavras-chave: The 3rd APEC Workshop on Sustainable Agricultural Development; [[classification]]4.
Ano: 2004
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