Comparision of different cultivating forms for winter wheat in Weibei rainfed highland
ZHANG Zheng mao, REN Guang xin, MIN An cheng (Northwestern Agricultural University, Yangling, Shaanxi 712100, China)$$$$
In view of economic yield and the ratio of output/input,comparision of eight cultivating forms for winter wheat show that the film mulching and bunch seeding cultivation and the film mulching and double sides strip seeding are suitable for Weibei rainfed areas. Among them, this two forms increase yield by 1 251.0 kg/ hm 2 and 1 033.5 kg/hm 2 ,reaching up to 2 856.0 kg/hm 2 and 2 638.5 kg/hm 2 respectively. Compared with conventional cultivation, the percentage of increase gets to 78.0% and 64.4%. However, the ratio of O/I individually reach 1.78 and 1.90, which is 21.1% and 29.3% higher in comparison with the conventional cultivation.