desiccation of the deep soil layer under forest and grass vegetation is one of the crucial topics in scientific research for eco-environmental construction of the loess plateau.
林草植被深层土壤干燥化是黄土高原地区生态环境建设过程中面临的重大科学问题。
water is the primary limiting factor for forest and grass vegetation construction in semi-acid soils of the loess plateau area.
水分是黄土高原半干旱区林草植被建设的主要限制因子。
so soil desiccation occurance generally by vegetation should not be taken as a reason to doubt or even negate forest and grass vegetation construction in the loess plateau.
植被下土壤干化的普遍发生,不应当妨碍黄土高原进一步开展林草植被建设。
construction of forest and grass vegetation has dual significances to control of soil losses and sustainable development of agriculture in hilly areas of the loess plateau.
黄土高原丘陵沟壑区林草植被建设对控制水土流失和农业可持续发展具有双重意义。