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本文就土壤物理性质和植物生长及土壤管理间的关系提出了明确的新颖的概念。作者把土壤物理性质分成直接影响植物生长和间接影响植物生长两类。前者为H_2O,O_2,温度和机械阻力,后者为容重,质地,团聚体等。在直接影响的因子中,水是主要的。为使这些因子达到最佳状态,需对土壤进行管理,而容重、质地、结构等性质对管理措施有影响。在良好的土壤物理条件下,对管理的要求较低,在不良的土壤物理条件下,经特殊管理,作物也能高产。绝对好的土壤物理条件是不存在的。土壤质地、容重、结构等对判断土壤生产潜力不是最有用的。水势,O.D.R.,温度,机械阻力和植物生长有一定相关性。不同深度土层中的NT.WR是研究作物产量时表征土壤物理性质的最有用的资料。
This paper presents a clear and novel concept of the relationship between soil physical properties and plant growth and soil management. The authors classify the physical properties of soils into two categories that directly affect plant growth and indirectly affect plant growth. The former is H_2O, O_2, temperature and mechanical resistance, the latter for the weight, texture, aggregates and so on. Of the factors that are directly affected, water is the main one. In order to get the best of these factors, the soil needs to be managed, and the weight, texture, structure and other properties have an impact on the management measures. Under good soil-physical conditions, there is less regulatory requirements and with special management under poor soil-physical conditions, the crop can also be productive. Absolutely good soil physical conditions do not exist. Soil texture, bulk density, structure, etc. are not the most useful for judging the potential of soil production. Water potential, O.D.R., temperature, mechanical resistance and plant growth have some relevance. NT.WR in different depths of soil is the most useful data to characterize the physical properties of soils when studying crop yields.