冬小麦全膜覆土穴播播种量研究试验初报

A Preliminary Report on Seeding Rate Test of Winter Wheat Full-film Casing Bunch Planting

全膜覆土穴播免耕多茬栽培技术是甘肃省旱作农业区密植作物一项全新的栽培技术,仅有一些经验总结,对其增产、保墒、增效以及生态生理方面的理论研究几乎空白。鉴于此,根据省农技总站的安排,期望通过开展全膜覆土穴播冬小麦播种量研究试验,对全膜覆土穴播条件下冬小麦的适宜播种量与产量构成因素、籽粒产量、水分利用效率等方面的相关性进行探索。结果表明:当播种量为441.45万粒/hm2时,水分利用率最高,达10.96kg/(hm2.mm);随着播种量增大,籽粒产量、水分利用率降低。秦州区全膜覆土穴播冬小麦的最佳播种量为441.45～539.55万粒/hm2,即9～11粒/穴,理论最高产量可达6463.73kg/hm2。

The film covering seeding cultivation techniques of no-tillage much stubble is the dry farming oI Gansu Province area planting crop a new cultivation technology, only some experience summary, the increase production, synergism and preservation of soil moisture, ecological and physiological aspects of theory research is almost blank. In view of this, according to the province farming ability station arrangement, we expect through the film covering seeding winter wheat sowing quantity research trials, to film covering seeding winter wheat under the condition of suitable seeding quantity and yield components, grain yield, water use efficiency and other aspects of the correlations were explored. The results showed that： when the seeding quantity of 4414500 grains/hm^2, water utilization rate was the highest, amounted to 10.96 kg/（mm, hm^2）; with the seeding quantity increased, grain yield, water use rate declined. District film covering seeding winter wheat optimum sowing quantity was 4414500-5395500 grain/hm^2, 9-11 grain/point, theoretical maximum yield reached 6463.73 kg/hm^2.