Environment factors that affect Sophora davidii community recovery and the population development is water factor, such as soil water and coverage of community is comparative important. 影响狼牙刺群落恢复和种群生长的环境因素主要是水分因子(WF),其中土壤水分、群落盖度比较重要。
Experimental results indicated that the effect of nitrogenous fertilizer factor is greater than water factor in designed water and fertilizer levels; 试验结果表明,在设计水肥条件下,肥料因素对小麦生长和产量形成的影响大于水分因素;
The thesis introduce the basic conception, actuality and frame of the research in the first part, and points out that the research category is water factor design in modern civilian architecture space. 论文首先在绪论部分介绍了建筑与水的关系、建筑空间和建筑空间水要素的基本概念、发展及研究现状,并指出研究的主题是现代建筑空间中的水要素;
The laws of the height growth and the above-ground production growth of the community conform to the Logistic-model. The height growth and the above-ground production growth are affected by the water factor and the temperature factor mainly. 群落的高增长及地上生产量符合逻辑斯蒂增长模型(Logisticmodel),并主要受环境中水分和温度因子的影响。
Result of water factor, ecological environment have become sandy wasteland, deteriorate and salinization. These factors greatly restricted agricultural sustainable development. The land salinization and desertization and grass-land dege-neration are mainly environment disaster of arid continental basin. 由于水的因素造成农业生态环境正向沙化、退化和盐碱化方向发展,严重阻碍了农业可持续发展的进程。土地盐碱化、沙漠化和草原退化,是干旱内陆盆地主要环境灾害。