生态学是研究环境与生物之间关系的科学。耕作制度中,用地养地问题与农林牧三结合问题,都要根据当地的环境条件,做到因地制宜。这就与生态学发生密切的关系。生态系统,就是自然界中生物与环境之间通过能量和物质转化所构成的循环系统。而农业生产的本质,就是通过绿色植物,把环境中的太阳光能转化为化学能,把无机物质(土壤 Ecology is the science that studies the relationship between environment and living things. Farming system, the problem of land and farmland, animal husbandry and animal husbandry three issues, must be based on local environmental conditions, to do according to the local conditions. This is closely related to ecology. Ecosystem is the circulatory system formed by the conversion of energy and matter between the living and the environment in nature. The essence of agricultural production is through the green plants, the environment of solar energy into chemical energy, the inorganic material (soil