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“春争日,夏争时”。夏播玉米常因抢收抢种,劳动力紧张或肥源不足等原因,米不及施用基肥。为了使玉米幼苗生长健壮,以及后期增产,一股都在玉米生育期中追施化肥。但是,我国北方夏季高温多雨,氮肥极易挥发或流失,而采用少量多次施肥的方法,又会增加劳动力的支出。为解决这个问题,国内曾进行了多种方式的研究,如塑脂包膜、球肥深施,开沟集中施等。我们采用塑料袋装硫铵、施用时扎眼覆土,使化肥缓慢释放,提高化肥有效利用率,均衡地供给
“Spring fight, summer battle.” Summer sowing corn often due to rush grab seed, labor shortage or shortage of manure and other reasons, less than the use of basal fertilizer. In order to make the growth of maize seedlings robust, as well as the latter part of the increase, one in the corn growth period topdressing chemical fertilizers. However, the northern China is hot and rainy in summer, and the nitrogen fertilizer is highly volatile or lost. However, using a small amount of multiple fertilization methods will increase labor expenditures. To solve this problem, China has conducted a variety of ways of research, such as plastic coated, deep-fat ball, ditch and other facilities. We use ammonium sulphate in plastic bags and use eye-catching soil to release slowly the fertilizer, increase the effective utilization of chemical fertilizer and supply it evenly