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首页> 外文会议>Second International Conference on Sustainable Agriculture for Food, Energy and Industry Vol.1 >Effects of Polythene Mulch and Nitrogen Fertilizer on Nitrogen Fixation of Nodules in Peanut
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Effects of Polythene Mulch and Nitrogen Fertilizer on Nitrogen Fixation of Nodules in Peanut

机译：覆膜和氮肥对花生根瘤固氮的影响。

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The effects of polythene mulch and nitrogen fertilizer on nitrogen fixation of nodules in peanut were studied with high-yielding peanut cv. Luhuall from 1997 to 1999 in the campus and experimental farm of Shandong Agricultural University, Taian, China. The main results were as follows. Polythene mulch peanut was advantageous to rhizobium infection and nodule formation, and caused nodule form and fix nitrogen early. Polythene mulch decreased the nitrogenase activity(NA) of peanut before pod setting phase, but increased the nitrogenase activity after pod setting phase, and delayed the senescence of nodule, prolonged the period of nodule nitrogen fixation. Applying N fertilizer on peanut inhibited nitrogenase activity in nodules, mainly reduced the rhizobium infection and nodule formation. These inhibitory effects occurred chiefly before pod setting phase, and weakened gradually with the growth and development of peanut. Top-dressing N fertilizer at different phases all inhibited NA, but the inhibitory effects got more severe and longer with the earlier application, and got less severe and shorter with the later application. Compared with open-field cultivation, polythene mulch cultivation of peanut absorbed more amounts of fertilizer nitrogen and soil nitrogen before pod setting phase, but could mainly depend on the nodule nitrogen fixation for providing nitrogen nutrition after pod setting phase.
机译：以高产花生品种为研究对象，研究了地膜覆盖和氮肥对花生根瘤固氮的影响。 Luhuall从1997年至1999年在中国泰安山东农业大学的校园和实验农场工作。主要结果如下。聚乙烯覆盖花生有利于根瘤菌的感染和根瘤的形成，并引起根瘤的形成和早期固氮。聚乙烯覆盖降低了结荚期前花生的固氮酶活性，但增加了结荚期后固氮酶的活性，延缓了根瘤的衰老，延长了根瘤固氮的时间。花生施用氮肥可抑制根瘤中的固氮酶活性，主要减少根瘤菌的感染和根瘤的形成。这些抑制作用主要发生在结荚期之前，并随着花生的生长和发育而逐渐减弱。不同时期追施氮肥均能抑制NA，但较早施用抑制效果更严重，时间更长，而较晚施用抑制效果更弱，时间更短。与裸地栽培相比，花生覆盖地栽培在结荚期之前吸收了更多的肥料氮和土壤氮，但在结荚期后主要依靠根瘤固氮来提供氮营养。

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