保肥性

结果表明，煤矸石风化物由于吸附性能低，保肥性差，所以施用化肥时一次用量不宜过大。

The results showed that application rate of each time should not be high because of its low absorbability and low fertility preserving capability .

一次性施用氮肥后的残效、影响残效大小及持续性的主要因素是氮肥用量及土壤保肥性；

The key factors of residual effects and sustain after one time application of N fertilizer depend mainly on the application amount of N and soil nutrient holding capacity ;

结果表明：球场砂性太重、有机质含量太低，是制约果岭土壤保水保肥性的因素；

The results showed : the highly sandy texture and lower content of organic matter were limited factors of soil conservative water and fertilizer .

鄯善点为代表的戈壁改良含石砾砂壤土，透气性较好，保水保肥性较差，易产生深层渗漏。

The Shanshan study site represented Gobi desert improved gravel sandy loam soil . This soil and a poor water retain and fertilizer , and easy to produce deep leakage .

沉沙池区沙化土地是人为形成的沙地，土壤含沙量高、保水保肥性差、地表凹凸不平。

Sandy soil formed in sand-sinking ponds area is man-made desert , which has high content of sands , weak conservation of soil moisture & fertilizers , uneven soil surface as well .

同时参考卡庆斯基土壤质地分级标准，通过测定的土壤质地组成发现，剥离区土壤的剖面结构基本没有改变，保水保肥性较好，只需要改良土壤肥力，即可进行作物的种植。

Also referring to the Card-Qing Gaussian soil texture classification criteria , determination of composition of soil texture found the basic structure of the soil profile in the study area has not changed .