| Rice-xerophyte rotation is one of the most main way of rice in sichuan province, investigating the Rice-xerophyte rotation mode and comprehensive evaluation is beneficial to the development of high yield and benefit agriculture, can meet the demand of agricultural sustainable development, in order to further the positioning of the experiment provides a data basis and efficient Rice-xerophyte rotation promotes further optimization such as theoretical basis, beneficial to solve in today’s increasingly fierce contradiction between man and land in sichuan province. Sichuan province is populous province and agricultural province in China. How to make full use of limited land resources and local illumination resources to increase the per unit area yield of grain, agriculture and scientific research workers become the majority of the common problems are discussed. Existing in the plains and hills in sichuan area province. with rotation mode, on the basis of the preliminary investigation of selected chengdu plain is a typical representative of 8 kinds of patterns and hilly region is a typical representative of nine model detailed investigation. Using the questionnaire survey form to get the data, by using the variation coefficient method respectively to empowerment of indicators, according to the index weight and the index values of dimensionless, the three big benefit values of each mode and comprehensive benefit value; To analyze the evaluation results, the selection of effective province. with rotation mode, and put forward mode according to the objective conditions to further optimize and promote the rationalization of the opinion, to promote the sustainable development of agriculture. The results show that the rotation of rice and fruit vegetable and economic crops comprehensive benefits significantly than rice with good comprehensive benefits of traditional food crop rotation.(1) under the eight kinds of Rice-xerophyte rotation mode the season season rice and upland crops yield and fertilizer use intensity, cost investment, forage-livestock system research, the results show that the radish-rice planting season rice mode of 667m2 yield, cost and the highest forage-livestock system, 547.3 kg,897.6 yuan and 897.6, respectively, the rice season fertilizer use intensity is the largest is the wheat and rice crop rotation,133.9 kg/667m2 chemical fertilizers;Dry season the most productive or rice and carrots as 4682.2 kg, forage-livestock system is 1, the most expensive is the garlic and rice crop rotation,1768.4 yuan/667m2, the highest fertilizer use intensity was 213.1 kg rice and tobacco, its output is the highest, more than 10000 yuan.(2) the hilly region of nine province. with rotation mode, the output value, net benefits the best, highest ratio optimal is strawber ries-rice crop rotation mode, the pure income up to 309120 yuan/hm2, but chemical fertilizer pesticide use is serious, the cost per hectare as high as 3666 and 9208 yuan respectively;Output value of the lowest is rape-rice crop rotation mode, annual output value 29833 yuan per ha.(3) rapeseed-rice crop rotation mode and wheat-rice crop rotation in the plains are better than hilly region comprehensive benefits, rice and potato-patterns in the hilly area comprehensive benefit is better than plain. Investigation on no-till techniques and the development of agricultural mechanization, respectively is conducive to rape-mode benefits the improvement of rice, wheat, rice, hilly enough light and the larger temperature difference between day and night is beneficial to the improvement of yield and quality of potato. |
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