一、问题的提出和研究方法田间整齐度是指作物群体株高分布的整齐程度。作物生产是在田间群体条件下的作物生长、发育和成熟,群体内个体间的整齐与否,必将给群体带来“量”与“质”上的差异,以至影响产量。关于田间整齐度方面的研究,国内外在稻、麦作物上已做了不少工作,而对玉米则研究得不多。目前在玉米生产上还存在出苗不匀,局部过密,地力不均等,造成田间整齐度不高,导致植株在群体内所处的光照、温度、湿度等环境条件不一致,结果影响株型、穗型以及其它生理指标的不一致,产量因之降低。因此,田间整齐度在玉米高产栽培中是一 First, the problem raised and research methods Field uniformity refers to the crop plant height distribution of the tidy. Crop production is the growth, development and maturity of crops under the conditions of the field groups. The tidiness of individuals in the groups will inevitably bring about differences in “quantity” and “quality” to the groups and even affect the yield. On the field of the study of uniformity, both at home and abroad in rice, wheat crops have done a lot of work, but little research on corn. At present, the emergence of maize in the emergence of uneven, partial over-density, uneven soil fertility, resulting in the field is not uniform, resulting in plants in the group where the light, temperature, humidity and other environmental conditions are inconsistent, the results affect the plant type Type and other physiological indicators of inconsistency, the yield thus reduced. Therefore, field uniformity is one of the high yielding cultivation of corn