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本文主要探明以下问题:(1)小麦产量以起身、拔节两个时期追肥的最高。起身以前追肥主要是增加了穗数,起身、拔节两个时期追肥既可增穗又可增加粒数,拔节期以后追肥则主要是增加粒重。(2)籽粒蛋白质含量随施肥时期的后延而增加,土壤肥力水平越高,增长幅度越大。提高土壤肥力和后期补施氮肥是提高籽粒蛋白质含量的可行途径。(3)追肥对小麦产量与籽粒蛋白质含量的效应存在有同步增长的时期,拔节期以前各时期追肥,产量与籽粒蛋白质含量的增长是同步的;拔节期以后各时期追肥,只能提高籽粒蛋白质含量,而不能增加产量。起身、拔节两个时期追肥,产量最高,单位面积蛋白质生产量也最高。
This paper mainly to explore the following issues: (1) wheat yield to rise, jointing the highest two top dressing. Top up before dressing is mainly to increase the spike number, get up, jointing two periods of dressing can increase spike but also increase the number of grains, jointing stage after jointing is mainly to increase grain weight. (2) The content of grain protein increased with the extension of fertilization period, the higher the level of soil fertility, the greater the growth rate. Increasing soil fertility and late replenishing of nitrogen fertilizer are feasible ways to increase grain protein content. (3) The effect of top dressing on the yield and grain protein content of wheat increased synchronously. The top dressing and the increase of grain yield were consistent with the increase of grain protein content before jointing stage. After topdressing stage, top dressing could only increase grain protein Content, but can not increase output. Up, jointing two top dressing, the highest yield, protein production per unit area is also the highest.