紧凑型夏玉米后期增粒重六项关键技术措施

Six Items of Key Techniques and Steps for Increasing Kernel Weight of Erectophile-type Summer Maize During Its Late Growth Stage

本文根据近年来的小区试验和潍坊市紧凑型夏玉米单产 975 0～ 112 5 0kg/hm2 的高产实践 ,总结出了促进紧凑型夏玉米后期增粒重创高产的 6项关键技术措施。即 :及时锄地灭草 ,减少土壤养分无效消耗 ;增施攻粒肥 ,促穗大增粒重 ;浇足灌浆水 ,加快营养物质向果穗中运转 ;及时去雄 ,改变养分分配方向 ;禁止割叶削顶 ,形成较多光合产物 ;适当晚收 ,增加光合积累等。从而有效地促进了潍坊市夏玉米大面积增产 ,增产率达 13 72

According to the plot experiments and high yield experiences of erectophile-type summer maize with 9 750～11 250 kg/hm 2 in Weifang city Six items of key techniques and steps were summed up to increase the kernel weight and reach high yield of erectophile_type summer maize during its late growth stage Namely:Hoe soil and kill weeds in time to decrease the invalid wasting of soil nutritious matter; Supplement filling_grain manure to form big ears and raise its kernel weight;Irrigate adequate filling water in order to promote the transportation of nutritious matter to the fruit ears; Emasculate in time to change the distribution of nutritious matter;Prohibit cutting leaves and tops so as to form more photosynthetic yield;Harvest late properly to increase photosynthetic accumulation,etc The application of all the techniques and steps increased effectively the summer maize yield of Weifang city in a large scale,the ratio of increasing yield reached more than 13 72%