二季晚稻大田常有播插季节并不失时而后来竟成为穗数不足,实粒数少,千粒重低,产量不高的田块。这种田块大致有下面三种情况。第一种是,前期不发,中期猛发,病多虫多,以致抽穗成熟延迟,青秕粒多,产量低。群众称这种稻是“前期盼煞,中期急煞,收时气煞”。第二种是,前期早发,中期不早控,封行过早,通气恶化,也多招致病虫,结果是无效蘖多,穗型小,实粒少,产量不高。群众称这种稻为,“前期开心,中期担心,收时伤心,看有千斤长势,收时五六百斤”。第三种是,肥料不足,一直发不起来,插得虽多,但穗数却低于基本苗, Two seasons of late rice sowing often broadcast seasons do not lose time and later became less than the number of spikes, fewer grains, low weight, low yield plots. This plots generally have the following three conditions. The first is that the first period is not fat, mid-term fierce, disease more than insects, resulting in delayed ripening heading, barley tablets and more, low yields. The masses said that this rice is “pre-hope evil, the middle of emergency evil, closing the time of evil.” The second is premature early, mid-term early control, premature closure, deteriorating ventilation, but also lead to more pests and diseases, the result is inefficient tiller, panicle type, grain less, yield is not high. The masses said the rice is "happy in the early stage, medium-term in fear, and sad in the closing hours. The third is the lack of fertilizer, has been unable to send up, although inserted too much, but the number of spikes is lower than the basic seedlings,