红壤旱地多元高产高效益复种模式的研究

Studies on multiple cropping systems with high yield and benefit in upland field in red soil:

在１９９２～１９９３年定位试验基础上，１９９４年选择了粮经饲菜肥多元结构和高产高效的３种复种模式，以粮粮型（小麦—甘薯）模式为对照，继续开展定位验证，结果粮经菜型（青菜—马铃薯—玉米／棉花）的模式３和粮饲型（小麦∥黑麦草—玉米／甘薯）的模式１，年公顷产粮９．２９吨和１０．６４吨，较对照分别增产１．４％和１６．１％。模式３和模式１年公顷纯收益１．１５２万元和１．０８４万元，较对照增收３６．３％和２８．２％。

After the observation at fixed experiment for 2 years, three multiple cropping patterns showed potential for producing high yield and good profit, i e patten 1 (wheat ∥ red darnel-maize / sweet potato), pattern 2 (green vegetable-potato-cotton) and Pattern 3 (green vegetable-potato-maize / cotton), were selected to be confirmed on further studies in 1994; while the wheat-sweet potato pattern was used as the contrast Results showed that the yield of the pattern 3 and 1 were 9 29 and 10 64 ton year -1 ha -1 , being 1 4% and 16 1% higher than the CK, respectively The net income of the patterns 3 and 1 were 1 152 × 10 4 and 1 082 × 10 4 yuan year -1 ha -1 ,being 36 3% and 28 2% higher than CK, respectively The main reason for why those multiple cropping patterns could raise the yield and profit is that appropriate crops were used to adopt the local climatic characteristics As a consequence, the local resources of temperature, sunlight and water were better exploited, so that the output rate in upland field could be increased significantly