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刘更另同志的“关于农业土壤的几个问题”一文,对于我们今后讨论、学习和研究农业土壤,是有很大启发和帮助的。现在,我想从土壤肥力这个角度,和大家讨论一下农业土壤和自然土壤的关系。 一 我们说无论是自然土壤或是农业土壤,都是和肥力分不开的,不管它在量上的表现程度如何,只要是具有肥力,才算是土壤,因此肥力就成为了土壤区别于其它自然体的本质特征。所说肥力,根据B·P·威廉斯的意见,是表现在土壤对于植物所需要的水分和养料(灰份元素和氮素)关系上。只有同时同地、并且继续不断地供给植物生长发育,所需要的水分和养料的土壤,才是具有肥力的土壤。 由于自然土壤和农业土壤都具有肥力,能够生长植物(包括农作物),因而才保证了人类和一切动物的生命发展,才成了自然界中有机和无机之间,也
The article “Several Questions on Agricultural Soils” by Comrade Liu more shows great help and inspiration for us to discuss, study and study agricultural soils in the future. Now, I would like to discuss the relationship between agricultural and natural soils from the perspective of soil fertility. We say that both natural soil and agricultural soil are inseparable from fertility. Regardless of its level of performance, as long as it is fertile, it is soil. Therefore, fertility becomes the difference between soil and other natural bodies The essential characteristics. The fertility, according to B.P. Williams, is expressed in the soil’s relationship to the water and nutrients (ash and nitrogen) the plant needs. Only at the same time, and continue to provide plant growth and development, the soil needed moisture and nutrients, is fertile soil. Because both natural and agricultural soils are fertile, they grow plants (including crops) and thus ensure the life and development of humans and all animals before they become organic and inorganic in nature.