Study On The Productivity And Efficiency Of Six Different Forage And Grain Multiple Cropping Patterns

Improve the cultivation of forage in the agricultural district, promote the development of animal husbandry. This was an effective way to improve the competitiveness of our agriculture. This article have the six different forage and grain multiple cropping patterns as the study object, In this study, the growth of each crop, the effect on the growth, yield and quality of subsequent crops under different forage and grain multiple cropping patterns, the benefit of economic, economy and comprehensive were studied completely. The objectives of this research were to provide theoretical ground for the cropping system reform. The main results were as follows:1. The soil properties in ryegrass and rye field were improved. pH was lowered. Organic matter total N and available N, P, K were increased significantly. Thus the growth of subsequent crops were promoted.2. The organic matter and available N, P, K in HPR field were decreased significantly than those in rice field. There were much root in PHR field, Thus the growth of subsequent crops were decreased.3. The growth of annual ryegrass and rye cropping after rice were better,yield were the higher, and forage quality is better. The re-growth tillers, plant height, dry matter of annual ryegrass and rye cropping after rice were much than those of4. The growth of rice followed annual ryegrass and rye was promoted, the yield were higher than the yield of rice followed wheat. The growth of HPR after annual ryegrass and rye were promoted, the re-growth were better, yield were significant higher than that of wheat, HPR after rye had highest forage yield because rye was harvest earliest in spring so that HPR had longer growing season. Annual ryegrass was the better preceding crops of rice and HPR.5. After economic analysis the result showed: The economic efficiency of annual ryegrass-rice multiple cropping patterns was the highest, The economic efficiency of wheat-rice was the next, and annual ryegrass-HPR was the third. Annual ryegrass-riceand annual ryegrass-HPR were the better grain-forage, forage-forage multiple cropping patterns, that will promote the development of animal husbandry in the agricultural district.6. The result of gray relation analysis on the six different forage and grain multiple cropping patterns were showed: the order of comprehensive benefit was, annual ryegrass-rice>wheat-rice> annual ryegrass-HPR>wheat-HPR>rye-HPR>rye-rice.