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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
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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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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
Registros recuperados: 2
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