起垄栽培对夏玉米生态环境及生长发育的影响

研究了起垄栽培对夏玉米生态环境及生长发育的影响。结果表明，土壤垄作在一定程度上改进了耕层的土壤结构，提高了土壤温度，协调了土壤三相比，垄面５５ｃｍ以内土壤容重减少１２．５％，孔隙度增大１７．８％，田间小气候改善，风速变大，基部ＣＯ２的含量升高了６．６％，促进了根系的发育，干物质积累增多，叶面积指数增大，后期表现出较好的保绿性，茎鞘和叶片干重提高，输出减少，子粒灌浆速率增大，千粒重增加２６．７ｇ，单

Effects of ridge culture on summer maize ecological environment and growth development

The effect of ridge culture on summer maize ecological environment and growth development was studied. The results showed that the soil ridge culture improved the soil structure of plough layer,raised soil temperature,and coordinated soil tri phase ratio.The volume weight reduced by 12.5%.The soil porosity increased by 17.8%.The farmland microclimate improved The wind speed heightened and the CO 2 consistence near the ground rose by 6.6%.Whereby these promoted the development of roots increased dry matter accumulation,enlarged LAI,and the plant behaved more green area index in later stage.The dry matter of stem sheaths and leaves increased,and output reduced.The grains milking speed increased the kilo grains weight increased by 26.7g.The total weight of single plant dry matter raise by 32g.Meanwhile the plant leaning over ratio and vacant plant ratio decreased obviously.The plant height and the ear height lowered, the harvest index rose.The ear's characteristics improved. The yield increased 11.7% compared with the flatten culture.