不同土壤由不同的土粒组份构成,形成不同的保水、通气和肥力状况。沙土透气性好,根系容易从中获得必要的氧气,也易排除过多的二氧化碳,但持水力差,易使根系缺水,不利于无机营养元素的吸收,也容易流失;沙土白天增温快,夜间散热降温也快,土壤昼夜温差大。粘土持水力强,土温变幅小, Different soils are composed of different soil components, forming different water retention, aeration and fertility conditions. Sand permeability is good, the root system is easy to get the necessary oxygen, but also easy to rule out excessive carbon dioxide, but with poor water, easy to make the roots of water is not conducive to the absorption of inorganic nutrients, but also easy to drain; sand warming fast during the day, Cooling at night is also fast cooling, soil temperature difference between day and night. Strong water holding capacity of clay, soil temperature amplitude is small,