黄淮海夏玉米机械籽粒的可行性分析

I Experiment was conducted in Xinxiang experimental station of Chinese Academy of Agricultural Sciences. The feasibility of mechanical harvesting of maize grain was studied using 18 different types of maize varieties. The result showed that with the improvement of grain moisture content the grain broken rate, impurity rate and shattering rate increased significantly. Under the experimental conditions，when the water content of grain is lower than 26.96%, the broken rate, impurity rate and shattering rate rates were below 8%, 3% and 2%, respectively, and it can meet the requirements of quality grain direct harvest; The effective accumulated temperature during growing period of maize is the key factor affecting the water content of grain, grain moisture content decreased with the increasing of the growth period and the effective accumulated temperature. The effective accumulated temperature of the growing season of Maize in Xinxiang area can fully meet the requirement of mechanical grain harvest low moisture required. The study also found that different varieties had different grain moisture variation characteristics, Xianyu 335 and zhongzhong 8 grain water content decreased fast, is more suitable for mechanical grain direct harvest. The results confirmed that it is feasible for Huanghuaihai wheat / maize two harvest a year areas using mechanical harvesting of maize grain through the selection of cultivars and sowing and harvesting time appropriate.