摘要
晋南是山西主要棉麦产区,现有耕地中低产田占很大的比例(50％左右),所以提高低产田的生产水平和经济效益就成为提高农业总产量和总效益的关键问题。根据物质守恒定律,单纯依靠低产田自身的物质循环,很难达到农作物高产优质。故我们于1988～1990年连续三年在山西省永济县于乡,省劳改局农牧研究所低产田中播置了小麦肥料用量的试验,探讨提高低产田肥力以达到小麦高产优质和提高施肥效益的合理施肥措施。
The appropriate coordination method of fertilizers for increasing production and fertilizing in the low—yield field of the south area in Shanxi province,and the most economic amounts of inorganic phosphe—nitrogen fertilizer used in the field. These are the expertment's main exploration. Planting winter—wheat in the low—yield field and observing from 1988 to 1990 continuously, we get such conclusion: 1、Based on the field where straw was returned, and organic manure mixed with nitrogenous fertilizer and fertiphose, The increasing result is much effective according to the analysis of variance. The best fertilizer rate is: 500 kilograms sheep manure, 15 kilograms urea and 7. 5 kilograms ammonium phosphate per mu. Then the increasing production is 157. 0 kilograms per mu compared with CK according to the three years' average yield. 2、Based on the field where straw was returned, There is also a more effective result by us- ing 21 kilograms urea with 17. 65 kilograms ammorium phosphate. The average of three years' increasing production is 141. 8 kilograms compared to CK. Such prescription is most economic, and the rate of output and input is 3. 62. 3、There is,a positive correlation relationship between the improving amount of the soil available phosphate and the fertilization amount of fertiphos. Finally, we can say, it is necessary for increasing the phors supplement standard as quickly as possible to depend on using inorganic fertiphos rather than using organic manure purely.
