膜下滴灌条件下不同灌溉制度对玉米生长状况的影响

Influences of different irrigation schedules on growing status of maize with drip irrigation under plastic film

黑龙江省西部风沙土区是我国重要的商品粮生产基地,针对该区的自然灾害特点,在田间试验的基础上,分析了膜下滴灌条件下不同灌水量对玉米株高、单株叶面积、干物质积累和经济系数的影响,研究玉米生育期内最佳的灌水时期和灌水量。结果表明,膜下滴灌玉米生育前期适当灌水可以改善作物生长状况,从而达到高产、稳产的目的。玉米的生长动态均随着各时期灌水量的不同,呈现出明显的差异。在灌水总量相同的情况下,拔节期灌水的作用优于苗后期和三叶期。

The wind-blown soil region of western Heilongjiang Province is an important commodity grain base in our country. According to the characteristics of the resources and the natural disasters, based on experimentations in the field, the influence of different water supplies on plant height, leaf area, dry matter accumulation and economic coefficient were analyzed to obtain the optimal water supply stage and the water quantity of maize. The results showed that qualified water supply at the former stages with the drip irrigation under plastic film could improve the growing condition of maize to the aim of high and stable yield. The growth trends of maize had been significantly different with the different water supplies atthe growing stage. Under the condition of the same water supply, the effect of water supply in the jointing stage was the most significant, and the later seedling stage was in the second and the three leaves stage was at last.