论文部分内容阅读
近年来,河南棉区麦棉套种和油棉连作的耕作制度得到大面积推广,到1986年,全省套种面积达500万亩,占棉田面积的60％。由于这种方式共生期仅40天左右,而且麦林可抗御寒流对棉田的袭击,麦田瓢虫等天敌种群量大,又能控制棉蚜的危害,所以棉苗发育虽比一般春棉稍差,但能充分利用日光、地力,总经济效益大大超过一熟制春棉。据1983年全省八个重点县调查,亩产皮棉74.9公斤,小麦168.5公斤,虽比一熟制春棉减少皮棉6.9公斤,但却多收了168.5公斤小麦,
In recent years, the farming system of wheat-cotton intercropping and oil-cotton intercropping in Henan cotton area has been widely promoted. By 1986, the province’s inter-planting area reached 500 million mu, accounting for 60% of the total cotton area. Because this way symbiotic period is only 40 days or so, and Mai Lin can resist the cold raid on the cotton fields, wheat ladybugs and other natural enemies of large populations, but also control the harm of cotton aphids, cotton seedling development is slightly worse than the general spring cotton , But can make full use of sunlight, fertility, the total economic efficiency greatly exceeds a cooked spring cotton. According to the investigation of eight key counties in the province in 1983, 74.9 kilograms of lint per mu and 168.5 kilograms of wheat were harvested. Although they lost 6.9 kg of lint more than the one-crop system of spring cotton, they overdone 168.5 kg of wheat,