The physical character of soil was also improved after covering straw. The soil bulk density was reduced. Fieldmoisturecapacity and porosity percentage were increased.
覆草后土壤的物理性状也得到改善，土壤容重降低、田间持水量和孔隙度提高。
2
Field studies also showed that proper concentration of polymers could effectively improve water supply and moisture holding capacity, so as to improve the survival rate of seedlings.
野外应用表明，适当浓度的保水剂可以有效提高土壤保水能力和供水能力，提高苗木根冠比和成活率。
3
The effects of wilting point, fieldcapacity and initial amount of available soil moisture in root zone on soil moisture were positive.