arable soil 中文意思是什麼
arable soil
解釋
耕地土壤-
The elementary idea of the reference units method can be described as follows : firstly, by the setting of double series of reference units, we can control the highest and lowest land quality class of each village or town ; secondly, the class of the arable land will be get through the contrast between the arable land with the reference unit which has been selected in the same area, the difference in quality is the key factor to classify the land. the results show, 87. 6 % of the lands from i to iii distribute on alluvial and lacustrine plains, where the associated soils are mainly grey fulvo - aquic and calcareous concretions black ones. and 61. 4 % of them from iv to vi distribute on slightly rolling parts with mainly yellow - cinnamon soil developed from the diluvial and slope deposits
分等結果表明：臥龍區等的耕地中，有87 . 6分佈在沖積、湖積平原區，主要土壤類型是在河流沖積物上發育形成的灰潮土、在湖相沉積物上發育形成的砂姜黑土；等耕地中，有61 . 4分佈在壟崗區，主要土壤類型是洪坡積物上發育形成的黃褐土：而、等耕地集中分佈在丘陵區，主要土壤類型是殘坡積物上發育形成的粗骨性黃褐土，等別結果分佈總體上體現了不同地貌類型、土壤條件下耕地質量的差異。 -
The holocene loess - soil sequence in the loess plateau constitutes an excellent record of evolution of soil formation, monsoonal climate, aeolian dust accumulation and influences of arable farming of over 8000 years
長期農牧業的發展，使得天然植被在大多數地方已蕩然無存，大片的林地被開墾為農田或被開辟為城市用地。 -
With advantageous water, soil and organisms resources, the dadiwan culture, the yangshao culture, the longshan culture and the xiashang culture developed, original settling - down dry farming culture formed gradually, which laid sound foundation for agriculture civilization in the weihe valley ; among which, land use of arable farming was replaced largely by pastoral farming in the mixed area of agriculture and animal husbandry in north weihe region between 4 000 - 3 000 a b. p., because of dry and cold weather resulted in environment deterioration and soil degradation. at the beginning of 3 100 a b. p.,
在8500 3100abp全新世大暖期，渭河流域水、土、生物資源條件優越，人類發展了大地灣文化、仰韶文化、龍山文化和夏商文化，逐步形成了原始定居旱作農業類型文化，從而奠定了渭河流域農業文明的基礎，其間在4000刁000ab衛，渭河流域北部的農牧交錯帶，由於氣候的逐漸冷干化，導致水、土、生物資源退化，造成旱作農業土地利用方式由遊牧業取而代之。 -
It has the arable land over 4. 1 million hectares, and the soil quality is good, the terrain is flat and concentrated, which is convenient for piloting gravity irrigation and large scale reclamation
現有耕地410多萬公頃，而且土質好，地勢平坦，集中連片，非常便於引水自流灌溉和大規模開墾。 -
The author analyzed the hindering factors during the process of sustainable development of black soil resources in the black soil zone of northeast china through field work and data collection, and probes into the countermeasures, which are strengthening agricultural development planning, arable land conservation in black soil zone, cultivated technology improvement and basic cultivated land conservation, of sustainable development of black soil resources in the black soil zone
根據實地調研結合資料，分析了東北黑土帶土地資源可持續發展的主要問題；提出了黑土資源的可持續發展對策，即：加強農業發展規劃；保護黑土區耕地，農耕技術上改進，加強農田基本建設等。 -
Evaluation of soil quality of arable land in cixi city, zhejiang, china
慈溪市耕地土壤環境質量現狀及其評價 -
Black soil resources is rare natural resources in the world, and some issues, such as soil and water erosion, environment pollution, cultivated land conversion and arable land degradation, are becoming the main problems for sustainable development at the zone
摘要黑土資源是世界的稀缺資源，黑土帶的水土流失、環境污染、土地流轉、土地退化問題成為黑土資源可持續發展的障礙。 -
Water loss and soil erosion is one of the most serious environment problems in china, which has slowed down the social and economic development in some rural areas. in some places of china, it has resulted in the arable degradation, soil desertification, filling up of irrigation works, and the increase of droughts and floods, etc. in consequence, the agricultural condition and ecological environment there become worse and worse. the causes of water loss and soil erosion include both unfavorable natural conditions and irrational land use, such as deforestation for cultivated land use. after analyzing the causes of soil erosion and its harms to the natural environment and human living, the author suggested some strategies for water and soil conservation, such as ecological engineering, reforestation and the application of biological technology
中國是世界上水土流失最嚴重的國家之一，水土流失已成為我國的頭號環境問題.它不僅造成土地資源的破壞，導致農業生產環境惡化，生態平衡失調，水災旱災頻繁，而且妨礙社會經濟的發展和人民生活水平的提高.從自然條件和人為因素等方面出發，探討了我國水土流失產生的原因;分析了水土流失對耕地資源、旱澇災害、水資源利用、經濟發展等方面的影響;介紹了水土保持的一些有效途徑和措施 -
These imply that the spatial distributions of the different grades of the arable land, classified by the reference land unit method, reflect reasonably the spatial changes of geomorphological units and soil types. the linear estimation model between comparable productions and the corresponding quality ratings of 210 sample units shows that the coefficient of determination r2 is 0. 876, which means that 87. 6 % of the change of y is explained by the change of x. it is concluded that the arable land quality ratings calcul ated by the method can reflect the biologic productivities of land
另外，利用210個樣點單元的標準糧產量（ y ）與其對應樣地法土地質量分（ x ）進行線性擬合，判定系數r ~ 2等於0 . 876的含義是指y的變異中有87 . 6是由x引起，表明了樣地法土地質量分的高低較好地反映了耕地的生物生產力水平。 -
The region has little arable soil, and the mountainous landscape made for bad roads to the interior
這地方耕地稀少，山區地形使通往內陸的交通很差。 -
Although it has rich resources, population radical increase, inappropriate development behavior and the behavior of damaging the arable land cause the radical reduction of forest and grass rate, large - scaled water loss and serious soil erosion and the sharp conflict between human and nature
盡管這里蘊藏著豐富的資源，但長期以來由於人口膨脹和不合理的開發行為，特別是耕地的掠奪性經營，致使林草覆蓋率銳減，水土流失量大面廣，人口與資源、環境的矛盾十分突出。 -
During the study period, the soil nutrient of arable land and grassland reduced greatly and that of forestland changed slightly. the grassland has the highest soil nutrient, while the arable land has the lowest soil nutrient. as a consequence, the land use change in changling county in the past two decades leads to decrease in the net soil nutrient, as well as the deterioration of regional ecological environment.
20年來，耕地的養分水平下降很大，草地的養分水平退化明顯，林地土壤養分含量變化不顯著； 20年間林地和耕地的土壤退化程度有所緩和，但不明顯；各種土地利用類型的養分水平差異如下：草地林地耕地，說明了退耕還林還草的必要性。
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