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- 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。
- Using closed chamber technique and gas chromatography, in-site measurements of N2O, CH4 and CO2 greenhouse gase fluxes from grassland ecosystem were systematically conducted. 利用静态箱法采样，配以气相色谱仪法分析对草地N_2O、CH_4和CO_2温室气体通量进行了较系统的现场测量，同时对箱体内外温度进行同步观测。
- Composition of service value of grassland(rangeland) ecosystem in China, total service value of grassland ecosystem and service value of grassland were reviewed in the paper. 连续综述了中国草原/草地生态系统服务价值的构成,草地生态系统服务的总价值,各类型草地的生态系统服务的价值。
- Using closed chamber technique and gas chromatography, in-site measurements of N2O,CH4 and CO2 greenhouse gase fluxes from grassland ecosystem were systematically conducted. 利用静态箱法采样，配以气相色谱仪法分析对草地N2O、CH4和CO2温室气体通量进行了较系统的现场测量，同时对箱体内外温度进行同步观测。
- The cropland ecosystem, especially grassland ecosystem possessed important effect of regulation and domination in the ecology environment in the middle part of Tibet. 西藏中部农田,特别是兼具草地与林地两大功能的草地生态系统对区域生态环境具有重要的调节和控制作用。
- The growth and distribution of legume grass directly affect the development of grassland animal, recovery of damaged grassland and evaluation and management of healthy grassland ecosystem. 豆科牧草的生长及分布状况直接影响草地动物的生长,受损草地的恢复,健康草地生态系统的评价和管理等因素。
- However,because of the frangibility of grassland ecosystem,the development of grassland tourism is also fragile,the development of grassland tourism needs strict programming and management. 但是,由于草原生态系统的脆弱性,决定了草原旅游发展存在脆弱性,因此,在开发中需要更加严格的科学规划和管理。
- 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。
- grassland ecosystem replacement theory 草地生态置换理论
- Rice is the chief crop in most southern provinces. 稻子是大多数南方省份的主要作物。
- Although the services value of swampland and temperate grasslands are high per unit area, their value has little importance to the grassland ecosystem in Xinjiang due to their small area. 沼泽和温性草甸草原虽然单位面积服务价值很高，但在草地生态系统中所占的地位很低。
- The grain crop has gone down this year. 今年的粮食作物产量下降了。
- The main types of grassland ecosystem in Xinjiang were the humoral-desert grasslands and lower-flat meadows which occupy more than 58% of the area while their services value was just 43.17%. 从新疆草地类型看，温性荒漠草原、温性荒漠和低平地草甸是新疆草地的主体类型，占58%25以上，而其贡献率为43.;17%25；
- We have had the biggest wheat crop ever this year. 今年我们的小麦收获量是有史以来最好的。
- The reasons of fertility on the grassland ecosystems decreased were that the nutrients transferred from soil to plants, and no nutrients input on the artificial pasture have ... 草地土壤生态系统营养物质移出是草地土壤肥力退化的根本原因,无营养物质投入的人工草地更加剧了营养物质的迁出及土壤肥力的退化。
- Half the fruit crop froze out in the sudden cold. 一半的水果作物在突如其来的寒流中被冻死。
- Rice is the chief crop in this ares. 稻子是这一地区的主要作物。
- We had a poor crop of raspberries this year. 今年我们的悬钩子歉收。
- The farmer paid 3 laborers to gather the crop. 农场主雇佣3名工人收割庄稼。
