採食牧草 的英文怎麼說
中文拼音 [cǎishímùcǎo]
採食牧草
英文
forage-
The diet of the main dominat species of rodents allactaga sibirica in stipa breriflora steppe were studied in lhurihe sunit right banner inher mongolia by stomach content analysis the results showed that : 1. the main diet of allactaga sibirica consisted of green stems and leaves, seeds, roots and withered plants and also consisted of some insects when plant biomass were lowev. 2. ten species of plant were often selected by allactaga sibirica during the different periods allactaga sibirica always selected artemisia frigida, kochia prostrata, heteropappus altaicus, enneapogon borealis, eragrostis poaeoides. 3. the plant diet composition were same at the same period when water content were same but the plant diet compositon were difteren at the ditlenent periods when whater content were different
研究結果表明： 1 .五趾跳鼠的主要食物組成由綠色莖葉、種子、根、枯黃植物組織等組成，在植被生物量較低時期也採食一些昆蟲類食物； 2 .經常採食的植物種類有10種，其中在不同時期均喜食的植物有冷蒿、木地膚、阿爾泰紫菀、冠芒草、小畫眉草等植物； 3 .在水分條件相似的同一時間段內植物性食物組成較穩定，而在水分條件不一致的各時間段內，食物組成比例差異較大； 4 .有較強的幼嫩植物組織選擇和依賴性採食習性，且與放牧家畜存在較強的植物性食物資源競爭，因此是一種對草地植被破壞性和畜牧業危害均較大的鼠種。This study run through the basic idea of ecoregional approach methodology and systematic design by integrating agronomy, ecology, environmental economics, resource economics and maths. the study methods included macro - and micro - analysis, qualitative and quantitative analysis, theoretical and case study, statistical analysis and model simulation and so on. resources shortage and environmental pollution casued by intensive agriculture were examined for a specific suburban area shunyi district beijingissues were systematically analyzed including landuse changes, landuse driving force, water - limited yield simulation with wofost model, ecological, environmental and economical analysis of landuse, as well as optimizing pattern of landuse with rcsadss model
本研究立足於生態區域法的基本思路，採用系統設計的思想，通過農學、生態學、環境經濟學、資源經濟學、數學等多學科的交叉與融合，宏觀與微觀、定性與定量、理論與實證研究等相結合的方法，運用統計分析、模型模擬等技術手段，在大量調研基礎上，針對目前大城市郊區農業用地中存在資源短缺、環境污染等問題，以北京市順義區為典例，從土地利用現狀與動態、驅動力、 wofost模型產量模擬、生態環境經濟分析及種植業結構優化模式等方面進行了系統研究，獲得如下研究結果： （ 1 ） 2002年順義區的土地利用仍以農業用地為主，耕地、園地、林地和牧草地之和占總土地面積的56 ，農用地中糧食作物仍佔43 。
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