论文部分内容阅读
武威川水地区日照充足,灌溉条件好。但是玉米产量水平与其他两地区相比,则较长期地处于较低的地位,而且成本偏高。其主要原因,经调查是由于栽培技术措施不当,其中最关键的是密度过小或过大和偏重于过多的施用氮肥所致。为此,1980—81年在王城大队农科队进行了本试验。试验采用裂区设计,主处理为栽培密度,分每亩3250株、3700株和4150株三处理;副处理为氮素化肥施量水平,以纯氮计,分为每亩 N50、N40、N30和 N20四个水平。
Wuwei Chuanshui sufficient sunshine, irrigation conditions are good. However, compared with the other two regions, the level of maize production is lower in the longer term and at a higher cost. The main reason, after investigation is due to improper cultivation techniques, of which the most critical is the density is too small or too large and too much emphasis on the application of nitrogen fertilizer. To this end, 1980-81 in Wangcheng Brigade Agricultural Team conducted the experiment. The experimental design adopted split-plot design. The main treatment was planting density, 3250 plants per mu, 3700 plants and 4150 plants. The treatment of nitrogen fertilizer was sub-treatment, which was divided into N50, N40, N30 and N N20 four levels.