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2004~2005年,在益阳市开展了双季稻主产区稻田不同保护性耕作种植模式的作物生长发育与经济效益的比较研究。结果表明在保护性耕作栽培条件下,双季水稻生长发育具有较明显的优势,群体结构良好,经济产量和生物学产量明显增加,综合经济效益显著提高。5种冬种模式的土地生产率、劳动生产率和成本效率以马铃薯-双季稻、黑麦草-双季稻和小黑麦-双季稻排在前3位,而油菜-双季稻和绿肥-双季稻较低。
From 2004 to 2005, a comparative study was conducted on the crop growth and economic benefits of different conservation tillage modes in paddy fields of double cropping paddy in Yiyang City. The results showed that under the condition of conservation tillage, the growth and development of double cropping rice had obvious advantages. The population structure was good, the economic yield and biological yield increased obviously, and the comprehensive economic benefit was significantly increased. Land productivity, labor productivity and cost efficiency of the five winter-type models are in the top three of potato-double cropping rice, ryegrass-double cropping and triticale-double cropping rice, while rapeseed - double cropping rice and green manure - Double crop rice is lower.