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农业生产是一个由自然、生物、社会相互交织的生态系统.其本质是农业劳动者利用生物资源(农作物、牲畜、微生物等)和非生物资源(水、土壤、日光、空气、热等)进行连续不断的能量和物质的转换过程.当系统内的能量和物质的输入、输出维持某种程度的恒常状态,整个生态系统便处于相对的平衡,即生态平衡.当输入、输出发生改变或受外力干扰而偏离平衡点,在一定限度内,系统可通过自身的调节力(负反馈作用)和人的管理作用而恢复平衡,或建立新的平衡
Agricultural production is an ecosystem of intertwined nature, biology and society, and its essence is that agricultural workers make use of biological resources (crops, livestock, microorganisms, etc.) and non-living resources (water, soil, sunlight, air, heat etc.) Continuous energy and material conversion process.When the input and output of energy and material in the system maintain a certain degree of constant state, the entire ecosystem is in a relative balance, that is, the ecological balance.When the input and output changes or is affected External disturbances deviate from the equilibrium point. Within a certain limit, the system can restore the balance or establish a new balance through its own regulating force (negative feedback effect) and human management