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适时播种是培育壮苗、促苗早发,促根增蘖、安全越冬,稳操群体,提高成穗的重要措施。人所共知,小麦产量是由每亩穗数、每穗粒数和千粒重构成的,这三个因素的乘积越大,产量越高,在这三个因素中,对产量影响最大的因素是每亩穗数。在高产稳产的条件下,播量一定,每亩穗数又取决于冬前大分蘖的多少,成穗率的高低。因此,适期播种是实现增穗的重要途经。据调查,小麦分蘖出现的越早,成穗率越高。从百农3217定株观察结果看,一般十月底以前的分蘖,可百分之百成穗,以后随着分蘖时间的推迟、逐渐
Timely sowing is to cultivate strong seedlings, promote early seedling, promote root tillering, safe wintering, stable group, an important measure to improve ear. It is well known that the yield of wheat is formed by the number of spikes per panicle, the number of grains per spike and the weight of 1000 grains. The larger the product of the three factors, the higher the yield. Among the three factors, the most influential factor on the yield is Spike per mu. In the condition of high and stable yield, the amount of sowing, the number of panicles per acre depends on the number of tillering before winter, the rate of spike. Therefore, sowing is an important way to increase the ear by ear. According to the survey, the earlier the wheat tiller appears, the higher the ear morbidity. According to the observation results of 100nong 3217 plants, the tiller generally before the end of October can be 100% spike, and later with the postponement of tillering time, gradually