棉花甘薯牧草复种技术途径研究

The Research on Cotton, Sweet Potato and Rye Intercropping

棉薯草三熟和棉薯间作纯收入分别比单作棉对照增加75.5％和37.1％。棉花配套品种应高抗棉铃虫、丰产,甘薯配套品种应短蔓、早熟,牧草配套品种应抗寒性强适于冬春季生长;2m一带,棉花和甘薯各两行种植样式即可保持1050kg/hm^2的皮棉产量,效益又最高;10月25日左右播种黑麦草,播量为75～150kg/hm^2,11月初播种黑麦草,播量为150～225kg/hm^2;棉薯间作比单作棉田间耗水增加不明显,其灌溉管理同单作棉。

The net incomes of cotton and sweet potato and rye intercropping (CSR intercropping) and cotton and sweet potato intercropping (CS intercropping) increase by 75. 5% and 37.1% respectively than that of planting cotton only. The suitable cotton varieties should be insect resistant and high yielding; the suitable sweet potato should be of short vine; the suitable rye varieties must adapt to growth in winter and early spring. The model of 2 rows cotton and 2 rows sweet potato in 2 m can maintain 1 050 kg/hm2 ginned cotton yield and with the highest net income. Seeding rate of rye is 75 - 150kg/hm2 for October 25th, but 150-225kg/hm2 for November 5th. Water consumption of cotton and sweet potato intercropping was similar to single cotton, so their irrigation management is the same.