草地

So,we should utilize the primary data to carry on the fitting test by computer and go on with field survey to set up a systematic model which could predict happing dynamics of grasshopper precisely.

同时，利用所建立的模型，结合有关草地蝗虫的专家知识，在 DET 平台和网络系统上构建了&甘肃省草地蝗虫预测预报专家系统&软件，以便甘肃省草地防蝗工作有目的、有计划、有重点地进行。

The results indicated that the content of organic matter of the natural meadow and the arbor forest land in the 0-20 cm surface soil grew separately by 36.11% and 32.96%; the nitrogen content of the natural meadow and the arbor forest land was also high, being 66.88 mg/kg and 69.37 mg/kg, respectively; the content of fast-acting potassium in the surface soil was higher than that of meadow ,while the activity of the urea enzyme, alkaline phosphatese and sucrase of the arbor forest land was stronger than that of the other four land utilization modes.

结果表明，天然草地和乔木林地10~20 cm表层土壤有机质增长率均较大，为36.11%和32.96%，二者碱解氮含量也较高，分别为66.88和69.37mg/kg；乔木林地和灌木林地0~20 cm 表层土壤有效磷含量均高于天然草地和人工草地，乔木林地速效钾含量最高。

In order to evaluate the influence of zokor's consuming and excavating on pasture, the vegetation on zokor mounds was studied by index of grassland quality. The result indicates that,with the succession, the index of grassland quality increases strikingly.

为了评估鼢鼠觅食掘洞行为对草地牧草质量的影响，采用草地质量指数分析了鼢鼠土丘植被状况，结果表明：随着演替的进行，鼢鼠土丘草地质量指数显著增加。

The results show that an internal and mutual transformation of land-use types cause striking changes in soil erosion extent. The transition of cultivated land to woodland and grassland medicates erosion intensity, and the one from forestland to cultivated land and grassland aggravates erosion. In addition, land-use practices, including mainly human activities, have impacts on the content of suspended sediment.

研究表明，本区土地利用类型的内部转化和相互转化引起土壤侵蚀程度的明显变化；耕地向林地、草地的转化使侵蚀强度指数显著降低；林地向耕地、草地转化，均显著增加侵蚀强度指数；耕地、林地、草地的内部转化对土壤侵蚀也有少量影响。

The area of severely degraded grassland had increased to 818.97 km 2. In some places and in some periods overstocking did occur, but the grassland as a whole was not overgrazed. The degradation of local grasslands could be due to the...

在个别地区、个别时间、局部草地有超载，但从整体上讲，整个草地并不过牧；全球气温升高所引起的荒漠化，应是处于半干旱—半湿润干旱区的达日县草地退化、大片黑土滩产生的主要原因。

Basisd on the controlled stocking rates, comparable repeated experiment was conducted to understand the stability of grazing ecosystem in vegetation, soil and livestock, considered the year as the principal component to evaluate the effect and mechanism of annual precipitation on grazing ecosystem characteristics, using the coefficient of variation in terms of ANPP and decrease and increase of functional groups to reveal the ecosystem stability and ecological compensatory effect in grazing ecosystem. The result not only richens the study contents of ecosystem stability, but also provides a guide for adaptive rangeland management plans, which are promoted the ecological and economic sustainable development.

本研究首次采用重复性对比研究，对草原放牧生态系统的稳定性在草-土-畜3个方面的体现进行综合对比，分析年度和载畜率的协同效应，揭示降水量对草地生态系统稳定性维持的影响机制，运用草地植被地上净生产力的变异性和功能群的消长阐明载畜率对放牧系统稳定性和系统内部生态补偿效应的影响，不仅丰富了草原放牧系统的研究，而且对内蒙古荒漠草原草地适应性管理措施的制定和实施具有指导意义。

However. there are 5.6～8.0 fold potentialities of increase in grass yield, the animal product unit can be raised large...

可是草地有5.6～8倍的增产潜力，且有推动南方草地牧业发展的其他有利条件，我国南方草地牧业在未来必将获得较大的发展。

According to the 137Cs concentration distribution along a typical profile A-1, the sediment accumulation rate and the natural surface soil erosion rate are respectively 16.6t/km^2a and 45.95t/km^2a, which shows that about 63.88% of the eroded surface soil is removed by way of underground loss. The relative contribution ratio of surface soil loss and underground soil loss are respectively 70.13% and 29.87%. By comparison to the utmost soil formation rate 13.51t/km^2a in Maolan, the risk of soil erosion in the Engineering Monument grass-covered depression is higher.

2根据草地洼地典型堆积农耕地土壤剖面A-1的137Cs浓度分布特征，1963年以来的流域平均堆积泥沙数量是16.6t/km^2a，流域平均土壤侵蚀速率为45.95t/km^2a，约占侵蚀产沙数量63.88%的泥沙以地下流失的形式散失；(3)草地洼地小流域内地面土壤流失与地下土壤流失的相对贡献率分别是70.13%和29.87%；(4)以茂兰地区最大成土速率为依据推算出的允许土壤侵蚀量是13.51t/km^2a，草地洼地的土壤侵蚀危险程度极高。

However, research on the relationship between herdman's production behavior and grassland degradation is not very much.Peasant problem is the core of"Three Agricultural Problems"in China.

大多相关研究集中在区域内草地退化的表现和原因，而将牧民作为研究对象，从牧民的生产生活出发探究草地退化之间成因、寻求抑制草地退化措施的研究尚不多见。

Whether the selection of grassland grazing systems is reasonable has direct influences on sustainable utilization of grassland resources, bioenvironmental quality on grassland and herdmen's income.

草地放牧制度选择的合理与否，直接影响草地资源的可持续利用和草地生态环境质量以及牧户经营收入。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了