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由于我省冬季温暖湿润,小麦冬前分蘖发生比较旺盛。但由于分蘖间的相互荫蔽,最后能够成穗的分蘖不多,一般仅在30%左右,因此在冬前采用适当的农业技术措施,巩固冬前状蘖,抑制后期无效分蘖,增加分蘖成穗率是夺取小麦丰产的重要环节之一。在这方面,我省广大农村也有冬前培土壅根、抑制后期无效蘖滋生、提高早生蘖成穗的经验。但冬前培土壅根的缺点是不能改善麦苗中部分蘖的通风透光条件。为了提高麦苗的分蘖成穗率,我们于1981—1982年在我院农场小麦试验地上用2000斤/亩肥沃的细土从麦苗上方撒施入麦行中。这样不但改善了分蘖的通风透光和营养条件,而且抑制了后期无效分蘖的发生,提高了分蘖成穗率, 起到了增产的作用。现将试验结果简略报导于下。
Due to the warm and humid winter in our province, the occurrence of winter tillering is relatively strong. However, due to the mutual shade between tillers, the number of tillers that can eventually become spikes is small, usually only about 30%. Therefore, appropriate agricultural techniques and measures are adopted before winter to consolidate tillering in winter, inhibit late tillering and increase tillering to panicle Rate is one of the important links to seize the wheat yield. In this regard, the vast majority of rural areas in our province also have soil for cultivation before winter, inhibiting the growth of inactive tillers at the later stage and improving the earliest tillering experience. However, the disadvantage of planting soil before winter is that it can not improve the ventilation and light conditions of some tillers in wheat seedlings. In order to increase the tillering rate of wheat seedlings, we used 2000 kg / mu of fertile fine soil from the top of wheat seedlings in wheat field in our lab from 1981 to 1982. This not only improves the ventilation and nutrition of tillers, but also inhibits the occurrence of late ineffective tillers and increases the tillering rate and plays a role of increasing yield. The test results are briefly reported below.