range land soil 中文意思是什麼
range land soil
解釋
草場土壤-
There is a period of soil contents range from ten to twenty five days over the humid discussed area in summer, and the period is not obvious at the discussed zone of close oasis desert area in summer and winter. ( 2 ) soil temperature exits several periodic variations of different depths ranging from six to twenty four days in heihe region, and nine to thirty days in gaize and shiquanhe region. it also shows that gradient of soil temperature affects on the soil content movement more greatly in summer. ( 3 ) the land surface temperature of yangtze river lower region is retrieved from noaa - ahvrr data
（ 2 ）根據土壤溫濕資料，採用功率譜分析、 pca分析等方法，分析了兩種典型下墊面土壤溫度的時空分佈特徵及其對土壤水分運動的影響，發現研究區土壤溫度除日和年變化周期外還存在6 30天的不同周期；下墊面的非均勻性及其季節變化及溫度梯度變化對土壤水分運動有很大影響，冬季溫度梯度變化對土壤含水量影響大於夏季溫度梯度對上壤含水量變化的影響，且溫度梯度與水分運動方向相反。 -
3. it is clear that co2 concentration of epikarst ecosystem has been influenced for rain. the varied range of soil co2 concentration is mainly influenced by rain frequency, secondly the amount of rainfall for the epikarst ecosystem of woodland and uncovered land
3大氣降水對表層帶巖溶生態系統各層coz有明顯的「沉澱」作用，影響林地與裸地土壤各層coz濃度降低的幅度主要取決于降雨的頻率，其次才是降雨量，而影響植被? ?空氣系統各層co 。 -
Fourthly, critical value of erosive modulus, which may cause soil carbon and nutrient changing, has been taken. the results of simulation showed that different soil nutrient element ( c, n, p, k ) have different soil acceptable erosive modulus in different land use types. for example, in this study, the critical value for nitrogen is located in the range of 1500 - 2000t / km2for forest land, 2000 - 2500 t / km2 for tillage land, 2500 - 3000 t / km2 for garden land, and 1000 - 1500 t / km2
四、得到了引起土壤碳和養分發生變化的侵性模數閥值:通過對地塊土壤侵蝕模數、碳和養分含量變化的計算，得到了不同利用類型中不同元素含量出現下降的最低侵蝕模數閥值，如耕地全氮為2000一2500噸，果園全氮為3000一3500噸，林地全氮為1000一1500噸，草地全氮為1000 - 1500噸，從而為流域侵蝕治理規劃和生態環境建設提供了科學依據。
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