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硫肥对油菜的增产效应 总被引:2,自引:0,他引:2
在3个地区7个点进行油菜硫肥试验。结果表明,施用硫肥比不施硫肥的油菜生长好,菜粒产量高。土壤SO^2-4-S含量在26.0mgkg^-1以下,施用硫铵的比对照增产14.8-49.8%,达到极显著或显著水平,施用硫磺比对照增产6.5%-34.2%,达极显著或显著水平。 相似文献
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STUDYONBEHAVIOUROFCRFORMULATIONOFTHIOBENCANBINAMODELPADDYFIELDSunJinhe(孙锦荷);LiXingming(李兴明);ChenZiyuan(陈子元)andZhangQinzheng(张... 相似文献
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~(14)C-butachlor and ~(14)C-oxadiazon could be released from four kinds of CR formulations into water respectively, and the release percentage of each herbicide increased with time, which could be expressed by regression equations (very obvious positive relationship). The release percentages of ~(14)C-herbicides from CR formulations were related to herbicide CR formulation and water type. Total recovery including ~(14)C-released and ~(14)C-left in formulations for each ~(14)C-herbicide was high at the 56th day after treatment. Some of the released ~(14)C-butachlor in water could be hydrolysed although under dark condition. The rate of hydrolysis was influenced by water type and formulations. 相似文献
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用示踪技术研究不同施肥方法对油菜吸收利用氮,磷的影响 总被引:1,自引:0,他引:1
利用同位素^15N和^32P标记肥料了尿素的施用方法和磷脂的施用位置对油吸收利用肥料N、P的影响。^15N-尿素在苔期和花期作为追肥分别以表施、1%水溶液灌浇和表施后灌浇99倍水三种方式施用,其测定结果表明全株对尿素氮的回收率分别为24.44、32.15%和27.38%,籽粒对尿素氮的利用分别为13.11%、21.77%和15.94%,处理间差异均极显著,表明尿素以兑水灌浇吸收利用离最高。 相似文献
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