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合理的水田复种制能提高单位面积年总产,充分发挥水田的增产增值作用。我县有水田40万亩,占耕地面积的70.2％,因此,搞好水田复种是我县粮经生产的突破口,应进一步分析比较,因地制宜,逐步完善。 一、我县水田几种复种制的现状 1、肥—稻—稻复种制 该复种制七十年代初就已开始,常年面积为18万亩左右,最高年份达22万亩之多,近几年来,主要由于责任田变动和草籽种供应不足,致使面积下降到12万亩左右。据调查统计,该复种制绿肥(以紫云英为主)亩产鲜草1,000—1,500公斤,
A reasonable paddy field multiple cropping system can increase the total annual output per unit area, give full play to paddy field production and value-added role. My county has 400000 acres of paddy fields, accounting for 70.2% of the area of cultivated land, so paddy field cropping is a breakthrough in grain production in our county, should be further analysis and comparison, according to local conditions, and gradually improve. First, the status quo of several kinds of double cropping in paddy field in our county 1. Fertilizer-rice-rice multi-cropping The multi-cropping system has already started in the early 1970s with a perennial area of about 180,000 mu and a maximum of 22 million mu. In recent years, the area has dropped to about 120,000 mu mainly due to changes in responsibility fields and the shortage of grass seed. According to the investigation and statistics, the compound seed manure (mainly shiitake) yields 1,000-1,500 kilograms of fresh grass per mu,