环渤海低平原区青贮玉米垄作覆膜种植模式研究初报

为探索环渤海低平原区青贮玉米最佳种植模式,本试验以等行距露地平作为对照,研究了6种种植模式对青贮玉米光合特性、产量及耕层土壤水分、温度变化的影响。结果表明,宽窄行种植和起垄覆膜均能提高青贮玉米的光合速率、叶绿素含量和叶面积指数,同时各覆膜处理均能提高0~20 cm土层的土壤含水量和土壤温度。其中40/70垄作膜侧模式效果最优,较对照增产30.52%,差异达到显著水平。综合分析认为,40/70垄作膜侧模式具有土壤增温、集雨保墒、促进光合、稳产增产作用,在春季干旱少雨的滨海平原区具有广阔的应用前景。

Preliminary Study on Ridge Planting Pattern with Film Mulching of Silage Maize in the Low Plain Area Around the Bohai Sea

In order to explore the best planting mode of Silage Maize in the low plain area around the Bohai Sea,the effects of different planting modes on the photosynthetic characteristics,yield,soil moisture and temperature of silage maize were studied,taking the equidistant horizon as the control.The results showed that broad and narrow row planting and ridge mulching could improve the photosynthetic rate,chlorophyll content and leaf area index of silage maize,and mulching treatment could increase the soil water content and soil temperature of 0-20 cm soil layer Among them,the effect of 40/70 ridge mulching was the best,the yield of which was 30.52% higher than that of the control,and the difference reached a significant level.According to the comprehensive analysis,the 40/70 ridge mulching model has the functions of increasing soil temperature,collecting rain and conserving soil moisture,promoting light harmony,stabilizing production and increasing production,and has a broad application prospect in the coastal plain area with less rain and drought in spring.