【摘要】 本研究用回归设计方法,探讨了山西省雁北地区水地春小麦可定量技术措施——灌水次数和时期、播种量、农家肥及氮磷化肥与春小麦产量和经济收入的关系.经1985年多点试验,获得了不同麦田生态型的数学模型.优选方案经1986和1987年的示范对比和小面积推广,证明是切实可行的,获得一定经济效益.更多还原

【Abstract】 With a regression design this study deals with the quantitative technical measures-irrigation frequency and dates, weight of seeds sown per hectare, ( rate of seeding ) , application of manure and chemical nitrogen and phosphorus fertilizers-in relation to the yield of spring wheat grown in irrigated fields in the Yanbei Prefecture of Shanxi Province and financial income. Through multi-point test, various mathematical models of ecosystems of wheat fields have been obtained. After application on a small scale and comparison in 1986 and 1987, the optimization plans proved to be feasible and profitable.更多还原