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Registros recuperados: 19
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2-Amino-4-Chloro-6-Methyl Pyrimidine 抑制氮肥硝化作用之研究(第二報) Taiwan Agricultural Research Institute
徐水泉; 溫西濱; S.C. Hsu; C.P. Wen.
[[abstract]]1.本試驗係根據第一報(農業研究第16卷第1期)之試驗結果繼續檢討AM對中壢粘土,香山砂土,屏東壤土等不同性質土壤中,硝酸化作用抑制效果及對水稻產量之影響。 2.據土壤實驗結果得知AM對氮素之硝酸化作用抑制效果受土壤性質之影響並不大而對砂土的效果較優。 3.盆栽試驗結果AM對容易發生脫氮作用環境下對水稻直播栽培稻谷產量之增收均有效果。 1. Following the preliminary report, the effect of A.M. was further studied on certain soils of varied properties. 2. The effect of A.M. was larger in sandy soil than in loamy or clayey soil. 3. A.M. may be advantageous for the cultivation methods under which denitrification is inevitable. (e. g., direct, sowing of rice under upland condition.)
Palavras-chave: [[classification]]10.
Ano: 1969
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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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Studies on Nutrient Absorption by Rice Plants in Taiwan (Part 1) Effect of Temperature on Nutrient Absorption by Rice Plants Taiwan Agricultural Research Institute
T.F. Cniu; S. Lian; S.C. Hsu; 邱再發; 連深; 徐水泉.
[[abstract]]The effect of high and low tempertures on the nutrient absorption by rice plants were studied by pot experiments in the two glass-houses. One glass-house with windows-clossed and the other with windows.opened are considered as the high and low temperature plots respectively. The former had temperatures 2°~3°C higher than the latter on the average during the growing period. The growth status, yield and nutrient absorption by rice plants under these two temperature conditions were comparatively studied. The results were obtained as following. The high temperature apparently promoted the elongation of plants, similarly in the 1st and 2nd crops, but had little effect on number of tillers. The dry matter weights of the plants in the high temperature...
Palavras-chave: [[classification]]4.
Ano: 1960
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STUDIES ON NUTRIENT ABSORPTION OF RICE PLANTS IN TAIWAN -(PART3) Nutrient Absorption of Rice Plants in Pingtung and Taipei Soils with and without Compost under Different Temperatures Taiwan Agricultural Research Institute
T.F. Chiu; L.T. Lee; S.C. Hsu; 邱再發; 李蘭帝; 徐水泉.
[[abstract]]Agronomic characters and nutrient absorption of rice plants, Taichung No. 65 under the following treatments were investigated using pot culture. Two temperature plots (different temperatures in two glass-house), two kinds of soils (Pingtung slate and Taipei sandstone and shale alluvial soils) and two different rates of compost (5) g per pot and no application of crude compost), thus total of eight treatments were examined in an experiment of factorial design. The high temperatures promoted plant length and heading date and increased the yields in the second crop. The high temperature also increased K contents and decr-eased N contents of straw. Total amounts of K absorption were generally increased by high temperatures. Kind of soil gave...
Palavras-chave: [[classification]]4.
Ano: 1962
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STUDIES ON NUTRIENT ABSORPTION OF RICE PLANTS IN TAIWAN ( PARTZ 2) Nutrient Absorption by Japonica and Indica Varieties of Rice in Relation to Temperature Taiwan Agricultural Research Institute
T.F. Chiu; S.Lian; S.C. Hsu; 邱再發; 連深; 徐水泉.
[[abstract]]Agronomic characters and nutrient absorption of a Japonica veriety, Taichung no. 65 and an Indica variety, Peh-mi-fen under different temperature conditions were investigated. Pot experiments were made in two glass-houses with different tempera-tures, one glass-house with closed and the other with opened windows The former had temparatures 2.4oC higher than the latter on the average for the growing period. 繼第一報以蓬萊種水稻,臺中65號觀察溫度對養分吸收之影響後,本年度另增在來種水稻,白米粉一種以比較兩品種水稻在不同溫度處理下之養分吸收狀況和生育性狀,結果如下。試驗仍如前報於兩玻璃室內進行,其一係玻璃窗開啟,另一則關閉以做為比較上之高低溫區。如此水稻生育期間,高溫區平均溫度可高於低溫區約2.4℃。
Palavras-chave: [[classification]]4.
Ano: 1961
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化學元素對作物病原菌之影響 第一報 Cd、Co、Cu、Zn及Mn等元素對稻熱病菌及稻紋枯病菌發育之影響 Taiwan Agricultural Research Institute
徐水泉; 杜自彊; S.C. Hsu; T.C. Dough.
[[abstract]]著者等為明瞭各種化學元素,對植物病原菌發育之影響而舉辦本試驗,並希望本資料能供抗病原理研究之參考;另一方面祈能成為新殺菌藥劑發現上之基木資料。又本試臉採用Cd、Co、Cu、Zn、Mn 等五種金屬之硫酸鹽、硝酸鹽、氯化物等三種鹽類共十五種化合物。並以稻熱病菌及稻紋枯病菌為試驗對象,將其主要結果事項列舉如下: (1) 本試驗採用之五種元素中以Cd對稻熱病菌及稻紋枯病菌之發育抑制力最為顯著。 (2) Co及 Zn兩元素在10-3Mol 時,亦有抑制稻熱病菌及稱紋枯病菌之發育。 (3) 在本試驗之三種銅鹽類中,除CuCl2有抑制稻熱病菌及稻紋枯病菌之發育外,其他鹽類均無顯著之抑制作用。 (4) 據本試驗之觀察 Mn 稍有促進發育之傾向。 (5) 三種鹽類之中以氯化物之毒性為最強。 (6) 對稻熱病菌發育抑制力之順位是 Cd > Co > Cu > Zn > Mn 而對稻紋枯病菌卻是 Cd > Co > Zn > Cu > Mn 之順位。 In order to clarify the influence of chemical elements (Cd、Co、Cu、Zn and Mn) upon the growth of Pirioularia orvzae Cay. and Corticium Sasakii (Shirai) Matsumoto et Yamamoto, this experiment was made. The results will be summarized as follows: 1. It was found that Cd is one of the most toxic element to the...
Palavras-chave: [[classification]]4.
Ano: 1961
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化學元素對作物病原菌之影響 第三報 含鎘化合物對稻紋枯病之防治效果 Taiwan Agricultural Research Institute
杜自彊; 徐水泉; T.C. Dough; S.C. Hsu.
[[abstract]]1. 本試驗根據本文第一報之室內試驗結果,在盆栽及田間舉行防治上之應用試驗。 2. 盆栽試驗時以五種鎘化合物與Asozin作防治效果之比較得知CdSO4與CdCl2二種化合物之防治效果良好,但藥害亦甚。 3. 藥害問題曾加用生石灰(CaO)二位量獲得消除。 4. 田間試驗結果CdCl2及CdSO4對本病之防治效果比Asozin為佳。 1. The experiment of control effect was based on the results of the indoor test in our first report (Report 1) and practiced in pots and field. 2. We compared the effects of five cadmium compounds with Asozin in pot culture, and found that CdSO4 and CdCl2 were the most effective ones but had severe phytotoxity. 3. The problem of phytotoxity was solved by adding two parts of calcium oxide to one part of CdSO4 or CdCl2. 4. The results of the field experiment showed that the control effect of CdCl2 and CdSO4 were better than that of Asozin.
Palavras-chave: [[classification]]10.
Ano: 1966
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尿素在臺灣水田土壤中的動態之基本研究 第一報尿素在水田土壤中之銨化作用 Taiwan Agricultural Research Institute
徐水泉; 溫西濱; S.C. Hsu; C.P. Wen.
[[abstract]](1) 為探討尿素與硫酸銨對水稻之肥効差異原因:選擇本省主要水田土壞十二種類(臺北、桃園、中壢、新竹、香山、豐原、臺中、溪湖、新營、佳里、屏東、花蓮)測定尿素在不同性質土壤中之銨分解狀況。 (2) 根據試驗結果尿素在水田土壤中銨分解之緩速受土壤溫度,反應質地,有機質含量等之影響甚為顯著,即最適宜銨分解之溫度為35℃左右而土壤溫度較高時各土壤間之分解日數差異甚小。 (3) 對土壤理化性質而言之尿素,在中性土壤中其分解較速於酸性土壤,而質地屬於砂質或坋質土壤中有機質含量較高之土壤銨分解亦較速於砂土或粘土。 (4) 尿素之銨分解之緩速由土壤別而言溪湖砂質壤土最速新竹坋質壤土,豐原壤土,新營坋質壤土次之,花蓮坋質壤土,桃園壤土,屏東壤土又次之臺中砂質土,佳里壤土,臺北坋質壤土香山砂土,中壢粘土最緩之順序。 (1) To obtain basic information for the rational application of urea in various paddy soils in Taiwan, the rate of ammonification was studied on twelve paddy soils collected from the main paddy fields all over the island. (2) The results showed that the rate of ammonification was largely affected by soil temperature, pH value and organic matter content in soil : It was faster in nuntral soils...
Palavras-chave: [[classification]]4.
Ano: 1969
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微量元素對水稻苗床之影響-(第一報)單獨施用微量元素對水稻幼苗生育之效果 Taiwan Agricultural Research Institute
徐水泉.
Palavras-chave: [[classification]]4.
Ano: 1952
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微量元素對水稻苗床之影響-(第三報)錳對水稻收量之影響(水耕試驗) Taiwan Agricultural Research Institute
徐水泉; 邱再發; S.C. Hsu; T.F. Chiu.
[[abstract]]為明瞭錳對水稻收量之影響進行水耕試驗。育苗時期使用500ml燒杯,移植後使用21玻璃筒為水耕容器,每星期調換培養液二次。本試驗分為兩部分。 (1) 苗床施用錳對水稻收量之影響:錳處理之稻苗移植後不施用錳,其結果錳處理與對照無錳區之生育情形及收量大略相同。因此受錳影響之健全稻苗其後之生育中無繼績施用者其效果即消失。 (2) 移植後施用錳對水稻收量之影響:依錳濃度不同影響水稻生育甚大。尤其適量之施用對分糵及藁谷收量有良好影響。Mn 1~5ppm時效果最佳,20ppm時收量減少,50ppm時毒害甚大。對照區(無錳)之藁收量為100時,Mn 1~5ppm為124,Mn 20ppm為76,Mn 50ppm為34,對谷收量之指數,Mn 1~5ppm為116,Mn 20ppm為70,Mn 50ppm為19。 培養液錳濃度對水稱中錳含量有正相關而對水稻中氮、磷、鉀含量似乎無影響。此等要素含量在藁部比根部高。 In order to ascrtaining the effect of manganese on the yield of paddy rice, water culture experiment were carried out in the green house. 500 ml. beakers as germination beds and 2 litre glass cylinders as water culture vessels were used. Culture solution was changed twice a week. There were two sections in this experiment being concerned. (1) The...
Palavras-chave: [[classification]]4.
Ano: 1957
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微量元素對水稻苗床之影響-(第二報)單用微量元素對稻苗生育之效果(水耕試驗) Taiwan Agricultural Research Institute
徐水泉; 邱再發; S.C. Hsu; T.F. Chiu.
[[abstract]]為明瞭施用微量元素對稻苗生育之影響,於玻璃室舉行苗床水耕試驗。使用燒杯為水耕容器,上面蓋紗布裝滿培養液然後播種。 依適量之錳處理,稻苗生育良好比對照區(無錳)確實可得健全之稻苗。錳之適當濃度為Mn 2ppm,而超過20ppm就呈現毒害,1,000ppm則致枯死。於Mn 20ppm,稻葉開始向中葉脈捲縮生長受阻害,此毒害現象在50ppm以上時更厲害。錳濃度至200ppm,稻種發芽率無受影響,而超過500ppm就降低。 化學分耕結果,隨培養液錳濃度增加稽苗中錳濃度也增加有正相關,則葉部錳含量為trace~2.13%根部為trace~0.92%。受錳處理之稻苗氣含量增加而鉀含量也稍有增加之傾向,磷含量者無此傾向。 對硼、銅、鋅、鉬、鈷另進行簡單試驗,其適量之施用對稻苗生育影響良好。據稻苗中三要素分析之結果,銅及鈿高濃度處理區之磷含量及硼高濃度處理區之鉀含量均有減低。 Water culture experiments were carried out for the purpose of ascertaining the effect of minor elements on the growth of rice seedlings. Beakers were used as water culture vessels. After laid the gauze on beakers for the germination beds, rice seeds were planted on them. Rice seedlings in the treated plot, which the proper amounts of manganese were applied, grew...
Palavras-chave: [[classification]]4.
Ano: 1957
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數種土壤改良劑對臺灣土壤性質之影響-1. Zeolite對土壤理化性質之影響 Taiwan Agricultural Research Institute
徐水泉; 王新傳; 林登鴻; S.C. Hsu; S.T. Wang; T.H. Lin.
[[abstract]]為探究Zeolite對本省土壤理化性質之影響,以提供檢討Zeolite在本省作為土壤改良劑之可能性之依據,特選擇本省主要耕地土壤五種,就每公斤風乾土壤,添加不同量(0.8g,4.0g,8.0g,16g及80g)之Zeolite,另設無加用者為對照,測定各處理土壤之有關理化性質,如土壤之弱酸可溶矽,及游離鐵含量,pH,陽離子交換能量(C.E.C),吸濕係數,最大容水量及有效水分等之變化。 分析結果顯示Zeolite加用對土壤之pH,游離鐵含量均無顯著影響,而對弱酸可溶矽,雖稍有增加效果,但仍未達到可作為矽肥料之程度。土壤之C.E.C隨Zeolite加用量之增加而有增加之趨勢,在不同土壤同處理間之C.E.C增加量,均相差無幾,但對原土壤C.E.C之增加比例,即原土壤本身之C.E.C較小之粗質地土壤之增加率比細質地土壤高。對土壤水分保持力之影響,即吸濕係數,最大容水量及有效水分也有隨Zeollte加用量之增加而增加之趨勢,對不同土壤之有效水分之影響言,除中壢粘土之紅壤外,其他土壤之有效水分增加量及增加率,均在粗質地的效果,比細質地者為高。 由上述結果Zeolite之使用,可提高土壤C.E.C及有效水分,而其效果均在粘土含量較低之坋質及砂質土壤較大,惟有效水分之增加量不多,故Zeollte之主要效果,似以增加土壤C.E.C為主。 關於Zeolite使用之經濟價值,及對各種作物生長之影響仍須待將來,各種作物栽培試驗果結,始能明暸。 The effect of Zeolite on physico-chemical properties of the soils was studied by applying different amounts of Zeolite to several...
Palavras-chave: [[classification]]4.
Ano: 1967
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施肥對于稻熱病之發生及藥劑撒佈效果之影響-(第二報)田間之施肥與稻熱病發生之關係 Taiwan Agricultural Research Institute
簡錦忠; 徐水泉; C.C. Chien; S.C. Hsu.
[[abstract]]為明瞭稻作於田間施用三要素之用量及施肥時期對于稱病害發生之關係,而舉行此試驗。玆將其主耍結果列舉如後: 1. 如氮肥之施用量增加2倍時,無論燐及鉀肥同時增加或較少者,葉、穗稻熱病之發生最多。 2. 氮及燐肥為普通量,而且鉀肥之施用量增加1.5倍或2倍時,病害之發生程度較輕。 3. 稻紋枯病之發病狀況與稻熱病之罹病狀況略同。 4. 三要素中對病害之發生最有密切之關係者為氮肥。 5. 稻穀之產量與病害之發生程度成為反比例。即無論稱熱病、紋枯病或葉鞘腐敗病之發生多時,其產量為低。 6. 增加鉀肥,而且一半為基肥,其餘為追肥時無論對病害或產量之影響皆最佳。 The relation between the prevalence of rice blast (Piricularia oryzae) disease, and rates and time of N. P. K. fertilizer application were studied. The result indicated that the degree of leaf and neck blast disease infections were greatly increased, despite of simultaneous increase of decrease of phosphorus and potash fertiliers. The blast disease infection was lighter when the N. P. K. fectilizers were applied at the rates of 80, 60, 60 or 80 kilograms per hactre...
Palavras-chave: [[classification]]10.
Ano: 1960
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施肥對于稻熱病之發生及藥劑撒佈效果影響-(第一報)稻苗試驗結果 Taiwan Agricultural Research Institute
徐水泉; 簡錦忠; S.C. Hsu; C.C. Chien.
[[abstract]]為明瞭稻作施用三要素方法對于稻苗稻熱病發生以及其藥劑防治效果而舉行此試驗: 茲將其主要結果列舉如後: (一) 當秧田施肥時,維持三要素之適當比率者,則可減輕稻苗稻熱病之發生,同時亦可增加稻熱病藥劑防治之效果。 (二) 對于稻熱病之發生,氮之影響最為顯著,即示正比例之傾向,而燐之影響不顯著,鉀則稍有抑制稱熱病發生之效果。 (三) 無論何種施肥情形下,稻熱病藥劑作為預防者,都較作為治療之效果為佳。 This expriment was carried out to obtain the relation between the application of fertilizers and the occurrence of rice blast or the effects of fungicidal control. Some essential results are summarized as follows: (1) The different level of three essential elements of fertilizers in suitable ratio could reduce the disease incidance and increase the fungicidal effects when they were applied to the rice nursery. (2) The occurrence of blast disease were most pronounced with a increase in nitrogen level. Phosphorus did not show prominent influence upon...
Palavras-chave: [[classification]]4.
Ano: 1957
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水稻稉米營養成分調查(續完) Taiwan Agricultural Research Institute
徐水泉; 林秉溱; 周新添; S.C. Hsu; P.C. Lin; S.T. Chou.
[[abstract]]民國53、54年就蓬萊水稻代表品種臺中65號及在來水稻臺中在來1號等八品種,進行糙米之營養成份調查;本調查乃著重灰成份之測定,分析項目計有水份、灰份、蛋白、純蛋白及鈣、磷、鐵、鉀等,所得成績見於表1~表4。 調查結果略示:如前報所述,在來種比蓬萊種水稻其蛋白含量大,又無論秈種或稉種二期作概較一期作者蛋白量高,並發現稻米蛋白可謂全由純蛋白構成之。 就本省最重要蓬萊及在米水稻代表品種臺中65號及臺中在來1號而言,其主要營養成份如以乾物百形比表示,即略為蛋白10.5%、灰份1.5%、鈣25mg%、磷350mg%、鉀260mg%、鐵2.3mg%等。 蛋白與灰份偕灰成份間之相互關係,經調查結果乃知蛋白與灰份間有正之相關關係,而灰成份中僅鉀乙成份與蛋白具成正相關。 A chemical survey on the nutritive constituents of paddy rice in Taiwan was conducted in 1964~1965. The main varieties of rice, such as Taichung No. 65 and Taichung Native No. 1 etc., were treated and chemical analyses were made on brown rice. The result was shown in Table 1~4. The amounts of the principal nutritive constituents of rice were in the neigh bourhood of 10.5% with protein, 1.5% with ash, 25 mg% with Ca, 350...
Palavras-chave: [[classification]]4.
Ano: 1967
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臺灣水田土壤之養分滲濾損失研究-(第一報) 硫酸銨與尿素對水稻之效應及其在水田土壤中之滲濾損失情況 Taiwan Agricultural Research Institute
徐水泉; 林明華; 邱再發; 李蘭帝; 黃文良; S.C. Hsu; M.F. Lin; T.F. Chiu; L.T. Lee; W.L. Huang.
[[abstract]]利用土壤滲濾水裝置(Lysimeter)使用四種不同水田土壤舉行硫酸銨與尿素肥料之比較試驗,調查硫酸銨及尿素肥料對水稻之肥料效應及其在水田土壤中之氮素滲濾損失情況,經四年共七期作之試驗結果如下: 1. 硫酸銨與尿素對水稻株高及分蘗之效應,兩者相差甚微,對谷藁產量之效應則硫酸銨優於尿素,以硫酸銨做100時,尿素之相對產量分別為96,94。尿素在砂質壤土之臺北及屏東土壤對谷產量之效應優於硫酸銨,但在坋質壤土之員林及中壢土壤則較硫酸銨為差,對藁產量之效應,則無論何種土壤尿素之效應均較硫酸銨為差。 2. 水稻對硫酸銨之氮素吸收率高於尿素,前者為38.12%,後者為32.55%,且不論何種土壤水稻對硫酸銨之氮素吸收率均較尿素為高。 3. 水分及各要素之滲濾因土壤與期作不同而異,水分滲濾大小依次為臺北>員林>屏東>中壢,而要素之滲濾大小為 Ca > Mg > K > N > P。一般而言,滲濾水量與各要素之滲濾損失量有平行關係,滲濾水量多則要素之滲濾損失亦多。N,K之滲濾損失臺北及員林土壤較屏東及中壢土壤為多。P,Ca,Mg等之滲瀘則以中性之員林及屏東土壤為多。 4. N之滲濾損失硝酸態氮比銨態氮為多,且因氮素肥料不同而有差異,銨態氮之滲濾損失硫酸銨較尿素為多,但硝酸態之滲濾損失則反之。 5. 硫酸銨之氮素滲濾率較尿素為大,但兩者相差甚微,前者為6.21%,後者為6.04%。硫酸銨之氮素滲濾率除中壢土壤外,第一期作較第二期作為高,但尿素則不論何種土壤其滲濾率第一期作恒較第二期作為高。一般言之,在酸性之臺北及中壢土壤之氮素滲濾率較中性之員林及屏東土壤為高。 6. 尿素對稻谷生產效應不如硫酸銨之原因,根據本試驗結果並非因尿素之氮素滲濾較硫酸銨為大之故。 On...
Palavras-chave: [[classification]]4.
Ano: 1967
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臺灣泥炭作為肥料利用之研究-(第一報)臺灣泥炭之理化的組成 Taiwan Agricultural Research Institute
徐水泉; 林敬德; S.C. Hsu; C.T. Lin.
[[abstract]]泥炭之生成受氣候因子之影響,多形成於寒泠地帶,而熱帶亞熱帶地區則頗為鮮見,但在臺灣地質上屬於第三紀上新統及第四紀更新統地層中,有炭化程度輕微尚保留頗多量類似有機質性狀而幾無燃料的經濟價值者可稱為泥炭。 本研究以肥料立場檢討該泥炭之性質,及利用為目的而舉行者,茲就南投縣埔里及澎湖縣馬公兩處泥炭之理化的性質分析結果摘要如下: 1. 埔里、澎湖俱混摻土砂,埔里較少澎湖卻甚多,因之比重,有機質、全氮、揮發份等組成份參差頗為懸殊。 2. 無機成份,俱受土壤無機物之影響,均以硅酸、砂、鐵鋁氧化物佔其大部,而鈣、磷、鉀等均甚低。 3. 有機成份,埔里含量甚高,而以腐植酸、木素複合體為主成份,粗纖維,蛋白質略高,Bitumina,水溶性有機物較低,澎湖則含量低,而以粗纖維為主成份,其他成份則低。 4. 埔里產者:比重1.667,水份31.798%,有機質59.440%,灰份8.755%,全氮1,183%,pH值4.05,揮發份36.639%。 5. 澎湖產者:比重2.382,水份14.866%,有機質18.549%,灰份66.585%,全氮0.187%,pH值7.20,揮發份17.979%。 6. 埔里產之諸成份與美國等泥炭比較,則尚稱符合,澎湖者則頗差,似稱為“有機質土壤”較妥當。 7. 據上述結果著者認為在肥料利用上埔里產泥炭為較適合之原料。 Generally speaking, peat have never seen in the sub-tropical or tropical reagions. But according to the geological survey reports, in Taiwan, there are a few deposit of so called...
Palavras-chave: [[classification]]4.
Ano: 1960
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關于石灰氮素施肥方法之研究-(第二報)水稻在沖積細埴已耕土栽培結果 Taiwan Agricultural Research Institute
徐水泉; S.C. Shyu.
[[abstract]]本研究為求石灰氮素的實用並求合理的施用法起見,故就作物生育及收量兩方面檢討之。以臺中65號水稻為試驗作物用沖積細埴已耕土為試驗土埌,而在插秧前每隔二天為一期,分期分區施用石灰氮素,施後灌水,使與土埌充分混和,並以磷肥及鉀肥與石灰氮素同時加用或無加用等諸法而檢討石灰氮素施用之適期。今將其主要結果摘錄如下: (1)在此種土埌湛水狀態下,無論有否磷肥及鉀肥之存在石灰氮素的施用適期大約是在插秧前6天左右。 (2)石灰氮素區常比硫錏區之PH值稍高。 (3)石灰氮素在土中的分解在本試驗的條件之下,與磷肥及鉀肥之存否其影響甚少。因此在本試驗範圍內,石灰氮素的分解比較的多受土埌膠質化學性質的影響。
Palavras-chave: [[classification]]4.
Ano: 1950
Registros recuperados: 19
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