| 1. | Interspecific association and niche of forest vegetation in rocky mountain area of north of china
华北土石山区天然植被种间联结和生态位研究 |
| 2. | Chapter 6 , the author explore the calculation methods of ecology water demand about nature vegetation , river , lake in tarim river watershed
第六章探讨了塔里木河流域的天然植被、河流和湖泊的生态需水量的计算方法，并计算了塔里木河流域的生态需水量。 |
| 3. | Probably half the world ' s species live in some 25 , mostly forested , tropical areas , where human actions have already removed more than 70 percent of the natural vegetation
世界上约有半数的物种居住在约莫25个热带地区，大多为热带森林，而人类活动已将这些地区70 %以上的天然植被给移除了。 |
| 4. | The holocene loess - soil sequence in the loess plateau constitutes an excellent record of evolution of soil formation , monsoonal climate , aeolian dust accumulation and influences of arable farming of over 8000 years
长期农牧业的发展，使得天然植被在大多数地方已荡然无存，大片的林地被开垦为农田或被开辟为城市用地。 |
| 5. | Besides enhancing the landscape quality of the city , the natural vegetation cover provides a source of fresh air for the built - up areas and sustains the biodiversity of the woodland ecosystem dominated by native species
天然植被不但可以提高本地景观的素质、为大厦林立的区域带来清新空气，更可维持作为本土物种栖息地的林地生态系统之生物多样性。 |
| 6. | The reproductive strategy of plants in shapotou played an essential role for vegetation stability . high resistance to drought and long life span enableed hedysarum scoparium and caragana korshinski to adapt themselves to the harsh environments
结果表明：在地处干旱半干旱的沙坡头地区，通过机械固沙与植物固沙相结合的防风治沙模式，建立的雨育人工固沙区植被经过多年演替形成的人工?天然植被是稳定的。 |
| 7. | This paper discusses the current situation , types , origins and developing trends of the bank caving , and then puts forwards countermeasures to prevent the geologic hazard by protecting natural vegetation , construction to conserve the banks and restoring grass and forests
本文全面论述了黑龙江、乌苏里江沿岸塌岸的现状、类型、成因及未来发展态势，提出了保护天然植被、护岸工程建设、退耕还林草等防治塌岸的具体措施和对策。 |
| 8. | According to " forestland steady moisture capacity " , water deficiency in the former is only in surface and recovers timely after rain season . but in artificial forestland , there is an apparent shortage especially in deep layer , so it affects growth and development of vegetation
以“林地稳定持水量”为依据，天然林地水分亏缺不严重，只在浅层形成了轻度亏缺，并在雨季后能得到及时的恢复；同时这种亏缺并没有影响到了天然植被的发育与演替。 |
| 9. | However the soil moisture content was affected by the type of vegetation growing at different parts of the slope . i tried to account for this effect , by choosing sample points with similar types of vegetation . the distribution and type of native vegetation was highly related to soil moisture
不同植被类型立地土壤水分的剖面特征差异较大，天然植被的土壤水分梯度多为负， 0 ? 400cm土壤上层水分含量比下层高；对照裸坡地和苹果园的土壤水分梯度为正值。 |
| 10. | It points out that the rational and stable inner structure cannot lead to serious soil moisture shortage ; its natural climate condition can meet the needs of forest community . it is the irrational management that causes the serious soil moisture shortage in artificial forestry land . if we intervene properly and create some growth condition similar to natural vegetation , the recessed artificial robinniapseudoscacia can restore benignly
当前人工林地的土壤水分出现严重亏缺而形成土壤干化层并导致人工林衰退是人为不合理经营造成人工林群落林分结构不完善的结果，如果人为干预适当，能创造出类似于天然植被的生存条件，人工植被完全有可能得到正常的生存和发展，出现衰退的人工刺槐林完全有可能得良好的恢复。 |
