论文部分内容阅读
随着种植业结构的调整和畜牧业的发展,玉米种植面积已具规模。近几年,哈尔滨农管局玉米种植面积每年都占粮豆面积的30%。由于玉米面积的扩大,土壤养分迅速下降,理化性状变差。为此,我们从1988年开始在香坊农场搞玉米秸秆还田,通过几年的实
With the adjustment of planting structure and the development of animal husbandry, corn acreage has been established. In recent years, the Harbin area of corn acreage accounted for 30% of the area of grain beans each year. Due to the expansion of corn area, soil nutrients decreased rapidly and the physical and chemical properties deteriorated. To this end, we started in 1988 in the Square farm corn stalks back through a few years