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1974～1983年在成都平原的广汉、德阳等县进行了种植制度的定位研究,其结果是:(1)以油(麦)稻为主体的二熟制具有较高的生产能力与经济效益,为本区近期基本耕作制;(2)土壤水分状况是影响土壤有机质的主要因子之一,不同水旱轮作之间有机质变化与有机肥引入量很难存在相关性,(3)无论何种多熟制方式,P_2O_3苗引入量只要达16斤左右即可保持平衡.在一定引入量范围内,钾的亏损是水稻土钾素变化的重要特点;(4)小麦连作因土壤微生物数量减少影响土壤供肥能力,导致小麦减产.
The results of the study on the planting system in Guanghan, Deyang and other counties of Chengdu Plain from 1974 to 1983 showed that: (1) The second crop system with oil (wheat) as the main body has higher production capacity and economic benefits, (2) Soil water status is one of the main factors that affect soil organic matter. It is difficult to correlate organic matter variation between different rotation and rotation with organic manure input. (3) No matter how much In the cooked mode, the amount of P_2O_3 introduced can be kept as long as about 16 kg, and the loss of potassium is an important feature of the change of K in paddy soils within a certain amount of introduction. (4) For fertilizer capacity, resulting in wheat yield.