摘要
focuses its discussion on the problem of how ecology can be made to serve agricultural production.Yu believes that in this respect stress should be laid ona study of plant cultivation and the circulation of material resources and energy inthe combination of the plant cultivation,animal rearing and biological cul-tivation industries.Questions of the rational use of excrement and the advantagesand disadvantages of the extension or reduction of the food chain receive particularattention.Yu also emphasizes economy in the use of non renewable resources in in-dustrial and agricultural production,as well as the prevention and control of pollutionand the protection of natural resources.All these,in his opinion,are important aspectsof ecological research.
focuses its discussion on the problem of how ecology can be made to serve agricultural production.Yu believes that in this respect stress should be laid on a study of plant cultivation and the circulation of material resources and energy in the combination of the plant cultivation,animal rearing and biological cul- tivation industries.Questions of the rational use of excrement and the advantages and disadvantages of the extension or reduction of the food chain receive particular attention.Yu also emphasizes economy in the use of non renewable resources in in- dustrial and agricultural production,as well as the prevention and control of pollution and the protection of natural resources.All these,in his opinion,are important aspects of ecological research.
