The results show that the main causes of small-old trees are the soil water deficiency, the low water utilization rate and the low fertility in soil.
研究结果表明，形成小老树的主要原因是土壤水分亏缺、水分利用率低和土壤肥力不足。
High concentration of salt in soil causes ion imbalance, oxidative damage, water deficit and nutrient deficiency, which lead to molecular damage, growth retarded, and even death of plant.
土壤中高浓度的盐分会使离子失衡、氧化伤害、水分亏缺、营养缺乏，并导致生物大分子被破坏、生长迟缓、甚至植株死亡。
Droughtpractice sharply decreased critical saturation deficiency and plant humidity needed (PHN) which made the plant water content improved under the condition of the same soil moisture.
干旱锻炼能明显降低临界饱和亏和植株需水度，使植株含水量在相同的土壤水分条件下得到改善。
Deficiency or excess of water in the soil could cause the tremendous decline of the nitrogenase activity.
土壤水分过多或缺乏，都导致固氮活性极大降低。
It is serious soil arid in Karst areas because of leaking of water from the rock. Deficiency of water and fertilizer, it has influence on the production of the fruit tree.
岩溶地区由于岩石漏水，造成土壤干旱严重，致使农作物经常缺水缺肥，影响果树的生产。
It is serious soil arid in Karst areas because of leaking of water from the rock. Deficiency of water and fertilizer, it has influence on the production of the fruit tree.
岩溶地区由于岩石漏水，造成土壤干旱严重，致使农作物经常缺水缺肥，影响果树的生产。
应用推荐