Study On Yield And Water Content Effect Of Crop In Different Intercropping Patterns In Dry Land Of Jin Zhong

This research investigated the soil water, the crop growth and water use efficiency of crop using the field test under the intercropping patterns including corn-soybean intercropping,corn-cabbage intercropping,corn-millet intercropping at the Shouyang dry farming station of Shanxi from April to October in 2007. The experimental results showed that:1. The soil water varies from different intercropping patterns. The water consumption is low for their shallow roots of soybean and cabbage, which use the soil water under the 0~100cm soil layer. However, the effect to the soil water reaches the depth of 3 meters for their long roots of the corn and the millet. Therefore, Maize-soybean intercropping could make full use of the soil water and light,heat,air resources, and improve water use efficiency because of their high-low structure. Maize-millet intercropping have some disadvantage because they can compete the soil water drastically for their high water consumption in maize and millet. .2. There is similar for the water-consuming law between the crops in all treatments, which showed the characteristics of the lower water consumption in earlier growing age,the higher water consumption in middle growing age and the lower water consumption in later growing age. The water use efficiency of maize in intercropping treatments is higher than that in sole cropping The water use efficiency of maize in intercropping treatments(240cm:240cm)increased by 42.8% than that in monoculture. The water use efficiency of maize and millet in intercropping is lower than that in sole cropping.3. The yield increased significantly under the intercropping pattern in this research.(1) In corn-soybean intercropping pattern, the yield of (3:3) treatment is the highest and the yield of corn reached 12671kg/hm2, which increased by 38.6% than that in sole cropping. The yield of soybean reached 2493kg/hm2, decreased by 6.7% than that in sole cropping.(2) In corn- cabbage intercropping pattern, the yield of (240cm:240cm) treatment is the highest. The yield of corn reached 13391kg/hm2, increased by 46.5% than that in sole cropping. The yield of cabbage reached 61006kg/hm2, decreased by 25.9% than that in sole cropping.(3) In the corn-millet intercropping pattern, the yield of (2:3) treatment is the highest. The yield of corn reached 12421kg/hm2, increased by 35% than that in sole cropping. The yield of millet reached 4366.2kg/hm2, decreased by 24.3% than that in sole cropping.4.With the calculation of the price of the corn(1.4RMB), soybean(5RMB), wild cabbage(0.8RMB), millet(3.2RMB) in 2007, it is the highest economic benefits in the corn-cabbage intercropping pattern. Among them the sole cropping of cabbage has the highest income which is 57285RMB/hm2. The sole cropping of soybean with single planting has the lowest income which is 9659RMB/hm2.5. Compared with the intercropping effect coefficient of every intercropping treatment, we can see that the corn-soybean intercropping pattern with the treatment of (3:3) has the significant increase effect on yield and water use efficiency. Therefore, it has better water-saving effect, and it is an intercropping pattern which is suitable for local characteristics.