硫肥对油菜的增产效应

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。     

STUDY ON BEHAVIOUR OF CR FORMULATION OF THIOBENCANB IN A MODEL PADDY FIE

ＳＴＵＤＹＯＮＢＥＨＡＶＩＯＵＲＯＦＣＲＦＯＲＭＵＬＡＴＩＯＮＯＦＴＨＩＯＢＥＮＣＡＮＢＩＮＡＭＯＤＥＬＰＡＤＤＹＦＩＥＬＤＳｕｎＪｉｎｈｅ（孙锦荷）；ＬｉＸｉｎｇｍｉｎｇ（李兴明）；ＣｈｅｎＺｉｙｕａｎ（陈子元）ａｎｄＺｈａｎｇＱｉｎｚｈｅｎｇ（张...     

辐照土壤对作物生长的影响及作用机理研究

用25kGyγ射线辐照含水量25％的土壤。盆栽试验表明,新疆灌耕灰漠土和浙江潮土经辐照后种植的冬小麦、辣椒和枸杞的株高、生物量和光合强度均有显著提高。6种类型土壤经过辐照,氮、磷、钾有效量明显提高,铁、锌、铜有效量也有所增加,土壤有机矿质复合体的氧化稳定性明显下降。经辐照处理,新疆灌耕灰漠土和浙江潮土的有效氮供应量分别提高59.26％和82.35％,作物吸收的土壤氮分别增加4.48％和24.97％;灌耕灰漠土有效磷供     

RELEASE OF ~(14)C—BUTACHLOR AND ~(14)C—OXADIAZON FROM CR FORMULATIONS INTO WATER

~(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.     

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

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。