DNA content was unaffected when soil water content was above wilting point. DNA含量则不受土壤含水量高于萎蔫点的水分胁迫影响。
Under integration of soil hygroscopic coefficient and maximum water holding capacity, a proper mixing ratio of tailing sands to soil can decrease the wilting point, increase the range of soil available water and increase soil drought resistance. 综合吸湿水和最大吸水量,适当的掺砂比例可以降低土壤凋萎系数,增加有效水的含量范围,从而能提高土壤抗旱能力。
From 1998 to 2000, soil moistures of all the positions in the gully watershed reduced continually. Gully top and lower slope only had 8.1 % ~ 8.8 % of soil water and other locations were near to wilting point. 从1998&2000年,随降水量减少,切沟所有部位土壤湿度持续下降,即使在水分条件较好的沟顶和沟坡下部,土壤湿度也仅为8.1%~8.8%,其它部位则都接近于凋萎湿度。
M deep soil layer and caused the dried soil layer of 3 ~ 8? m soil layer, of which soil water content is nearly to or lower wilting point during long term. 在黄土高原半干旱气候背景下,人工林植被的耗水主要使黄土区中北部地区3~8m土层土壤含水量降低到长期接近或低于凋萎湿度,形成难以恢复的深厚土壤干层。
The nuggets of bulk density and wilting point are very tow, and the nugget of soil water content is decreased with depth. 容重和萎蔫含水量的块金值都很小,尤其是萎蔫含水量在各层的块金值都相等,含水量的块金值随剖面深度而降低。