三、土壤保肥性土壤具有吸收气态、液态与固态营养物质的能力叫土壤保肥性。例如,人和家畜的粪尿撒上细土后,其臭味就可减少;化学肥料施入土中,养分即不易流失。说明,土壤能通过物理、化学、生物等过程,保住各种形态的养分,并持继不断地供给作物。所以,保肥性是土壤的一种重要性状。土壤保 Third, soil fertility Soil has the ability to absorb gaseous, liquid and solid nutrients called soil fertility. For example, human and livestock excrement sprinkle fine soil, the odor can be reduced; chemical fertilizers applied to the soil, nutrients that are not easy to drain. This shows that soil can keep various forms of nutrients through the process of physics, chemistry and biology, and continuously supply crops. Therefore, fertility is an important trait of soil. Soil protection