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- Diagnosis of Grassland Degradation Degree and Its Perspectives 草地退化程度诊断系列问题探讨及研究展望
- Grassland degradation degree 草地退化程度
- Diagnosis of degradation degree of grassland ecosystem is the basis and the precondition of ecological restoration. 摘要草地退化程度诊断是退化草地生态系统恢复和重建的前提和基础。
- At the same time, the future focus direction of the study on diagnosis of degradation degree of grassland ecosystem was discussed. 同时，提出草地退化程度诊断存在的问题及今后研究的重点发展方向。
- Natural grassland degradation and ecological restoration in Aba region. 阿坝州天然草原的退化及生态恢复。
- More sheep and a buoyant mutton market have thwarted this approach and accelerated grassland degradation. 绵羊数量增加,羊肉市场活跃,使政府的计划受阻,并进一步加剧草原退化。
- The result of weight analysis made it clea r that grassland degradation was mainly due to overgrazing. 权重分析结果表明 ;超载放牧是导致草地退化的主要动因 ;而围栏封育与轮牧是可持续利用的最有效措施 .
- Grassland degradation of Tongde County was caused by both natural factors and human factors. 同德县的草地退化是自然因素和人为因素共同综合作用的结果。
- Main degradation types include sandy desertification, secondary salinization and grassland degradation. 干早区土地退化主要为土地沙漠化、土地次生盐渍化和草地退化；
- Denudation, grassland degradation and undue cultivation of land directly lead to the forming of the ecologically frail areas and the poverty of people in Sichuan. 森林过伐，草地过牧，土地过度垦殖，是导致四川生态脆弱地区形成和农民贫困的直接因素。
- Tu Jun,Xiong Yan,Shi Dejun.Study on alping meadow and grassland degradation with remote sensing techniques in Qinghai[J].Chin.J.Appl.Environ.Biol,1999,5(2):131-135. [2]涂军;熊艳;石德军.;青海高寒草甸草地退化的遥感技术调查分析[J]
- Human activity and climate change were two key reasons for grassland degradation of Zeku county.Rodent and pest destruction accelerated the serious situation. 人类活动和气候变化是导致泽库县草地退化、区域生态环境恶化的两大因素，鼠虫害对它们产生的影响起了促进作用。
- With aggravation of grassland degradation, species diversity, richness and evenness of plant communities obviously decreased, while dominance of community gradually increased. 随着草地退化程度的加重，群落的植物多样性和物种丰富度及均匀度都明显的随之降低，而群落的优势度逐步增大。
- Based on the current situation of grassland degradation of Tongde County, the causes of grassland degradation were analyzed and sustainable strategies for animal husbandry were provided. 在调查同德县草地退化现状的基础上，综合分析了同德县草地退化的原因，指出了同德县畜牧业可持续发展的策略。
- Zhou H k,Zhou L,Liu W,Zhao X Q,Lai D Z.Causes of grassland degradation and sustainable development of animal husbandry in Maduo County,Qinghai provinces[J].Grassland of China,2003,25(6):63-67. [5]周华坤;周立;刘伟;赵新全;来德珍.;青海省玛多县草地退化原因及畜牧业可持续发展[J]
- Grassland degradation was described as a process of retrogressive succession of grassland ecosystem resulted from human activities (over grazing, reclaim) and unfavorable natural conditions. 摘要草地退化是过度放牧、开垦土地等人为活动及不利自然因素影响下草地生态系统逆行演替的一种过程。
- The results show that the degradation degree and quality of degraded chitosan were affected by reaction temperature, time and quantily of hydrogen peroxide. 结果表明,反应温度、时间和过氧化氢用量对壳聚糖的降解程度及降解产品质量均有影响。
- There was a decline of AMF species with the degradation degree of grasslands: there was 10 species AMF which belonged to 4 genus in normal grassland, while there were only 7 species of 2 genus of AMF in seriously degraded grassland. 草原退化导致AM真菌种群数量减少:正常草原中AM真菌4个属10种,高于严重退化草原2个属7种。
- assessment of degradation degree 退化程度评价
- On the other hand, the non-irrigated farmland, forestland and grassland degrade more seriously among all types of landscape utilization. 就不同土地景观类型而言，旱地、林地、草地生态系统退化较严重。
