1) Wet land degenerating
湿地退缩
2) wetland degradation
湿地退化
1.
In this paper, the characteristics of wetland degradation in China were introduced from the aspects of functional area loss, material and energy imbalance, structure breakage, and ecological function impairment, and the causes of the degradation were summarized from natural and human’s aspects, respectively.
从湿地功能面积减少、湿地系统物质能量流失衡、湿地组织结构破坏、湿地生态功能减弱等4个方面着重介绍了中国湿地的退化特征;从影响湿地退化的自然和人为因素共同作用角度系统分析了其退化的原因;并介绍了湿地退化评价的3大技术体系。
2.
In the typical sampling zone of wetland degradation which means primitive .
研究表明,不同退化程度的湿地土壤具有不同的土壤物理性质,在未退化湿地→轻度退化湿地→中度退化湿地→重度退化湿地→已垦湿地(农田)的湿地退化研究样带上,湿地土壤温度呈现逐渐升高的变化趋势、土壤电导率呈降低变化、土壤水分呈降低趋势、土壤容重则呈现升高的变化规律。
3.
The climatic background and major climate causes for the wetland degradation in the Qinghai-Xizang Plateau were explored through analysis on the trends of precipitation, temperature and sunshine factors and their ecological effects in 4 wetland research sites chosen.
根据对与青藏高原湿地退化有关的水分、温度和日照等气候背景条件变化趋势及其生态环境效应的研究结果,认为全球和区域气候变化是青藏高原湿地退化的重要原因,其中年度内降水不均匀性的增加、日照时数的延长以及气温与地温的升高对高原湿地水分丧失和退化有着重要的影响,而主要气象要素在中小尺度上时空分配状态的变化和局地气候特征的改变则可能是湿地退化的更直接的原因和动力。
3) degraded wetland
退化湿地
1.
A study was carried out to compare degraded wetlands with farmland in nutrient content in the surface soil 0-30 cm deep.
退化湿地与农田土壤养分的对比研究结果表明,4种样地类型0—30 cm土层土壤有机质含量为水田>沼泽化草甸>旱田>典型草甸,全氮含量差异与有机质含量差异相一致,速效磷含量为水田>旱田>沼泽化草甸>典型草甸。
2.
Studies were made on nutrients and soil enzyme activities of degraded wetland in Napahai.
对滇西北纳帕海退化湿地土壤养分与酶活性的系统研究表明:人为活动干扰下不同湿地类型间土壤养分及酶活性存在明显差异;土壤有机质、全氮含量从原生沼泽向沼泽草地、草地、耕地逐渐减少;土壤脲酶、蔗糖酶、蛋白酶和过氧化氢酶的活性大小顺序也呈现出相同的趋势,多酚氧化酶则与此相反。
3.
So, study the physical and chemical properties of degraded wetland soils help to investigate the cause of wetland degraded and provide theoretical basis for wetlands ecosystem protecting.
因此研究退化湿地土壤的理化性质,不仅有助于我们了解毛乌素沙区湿地退化的原因,还为进一步保护湿地生态系统提供了理论依据。
补充资料：退缩
1.向后退;向后缩。 2.畏难不前;畏缩。 3.退隐;退休。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条