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本文采用投入产出法对农场的N素循环进行了分析。通过计算分析，得出本系统种植业的产投比为0．62，饲养业的产投比为0．48，系统产投比为0．40。说明系统N素的利用率较低。通过系统生产优势度和稳定性指数的计算发现：系统饲养业生产优势度大于种植业；系统稳定指数为0．34；森林覆盖率为18．6％．饲料转化率为20％。文中还指出了系统存在的主要问题。
In this paper, the input-output method of farm N cycle was analyzed. Through calculation and analysis, we can draw the conclusion that the ratio of production to investment of planting system in this system is 0.62, the ratio of production to investment in breeding industry is 0.48, and the ratio of production to production is 0.40. Indicating that the utilization of system N prime is low. Through the calculation of the dominance and stability index of the system, it is found that the superiority of the system-keeping industry is greater than the planting industry; the system stability index is 0.34; and the forest coverage rate is 18.6%. Feed conversion was 20%. The article also pointed out the main problems of the system.