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价值流是农业生态经济系统的重要特征之一,利用价值流特征来评价秸秆还田农业生产模式的经济效益具有重要意义。基于秸秆还田农业生产模式的定位试验,对不同还田模式下小麦—玉米轮作系统的价值流特征进行了研究。结果表明,小麦秸秆高留茬—玉米秸秆粉碎模式的经济效益是最好的,其利润、成本产值率、成本净产率、成本利用率、劳动生产率和劳动净产率都是最高的,分别为19811.91元·hm-2、2.47、1.55、1.47、31.64、19.81;最低的是小麦、玉米秸秆不还田,分别为16072.39元·hm-2、2.06、1.22、1.06、13.51、7.97。总产值和净产值以小麦不还田—玉米秸秆粉碎为最高,分别为33723.84元·hm-2、21737.84元·hm-2,小麦秸秆高留茬—玉米秸秆粉碎覆盖最低,为30500.03元·hm-2、18053.03元·hm-2。综合评判得分最大的是小麦秸秆高留茬—玉米秸秆粉碎,最小的是小麦、玉米秸秆不还田,分别为0.982和0.740。因此,小麦秸秆高留茬—玉米秸秆粉碎是该区种植业生产的最优模式,可大力推广。
The value flow is one of the most important characteristics of agricultural eco-economic system. It is of great significance to evaluate the economic benefits of straw-returning agricultural production by using the characteristics of value flow. Based on the location experiment of straw returning to agricultural production mode, the value flow characteristics of wheat-corn rotation system under different returning patterns were studied. The results showed that the economic benefit of wheat straw stubble-corn stalk smash mode was the best, and the profit, cost value, cost net yield, cost utilization, labor productivity and labor net yield were the highest, respectively For 19811.91 yuan · hm-2, 2.47,1.55,1.47,31.64,19.81; the lowest is wheat, corn stalks do not return to field, respectively, 16072.39 yuan · hm-2,2.06,1.22,1.06,13.51,7.97. The total output and net output of wheat straw did not return to the field - corn straw crushed to the highest, respectively, 33723.84 yuan · hm-2,21737.84 yuan · hm-2, wheat straw stubble - corn stalks smash the lowest coverage of 30500.03 yuan · hm- 2,18053.03 yuan · hm-2. Comprehensive evaluation of the largest score is the wheat stubble - stubble corn stalks, the smallest wheat, corn stalks do not return to the field, respectively, 0.982 and 0.740. Therefore, the wheat stubble stubble - corn stalk crushing is the best mode of crop production in the region, which can be vigorously promoted.