常見例句The perennial rhizomes formed closely crowed belowground networks. 多年生根莖在沙基質(zhì)中形成多層密集網(wǎng)絡(luò)結(jié)搆;Grasslands play a significant role in terrestrial ecosystem carbon cycle due to large biomass stored belowground. 摘要溫帶草地大部分生物量分佈在地下,地下生物量在草地生態(tài)系統(tǒng)碳循環(huán)中起著重要作用。S ratio (belowground to aboveground biomass ratio) has been widely used for estimating root biomass. 利用根冠比(R:S)和地上生物量來估算地下生物量是目前常用的方法,但目前缺乏根冠比的數(shù)據(jù)。Within the same density stand, the belowground competition index was significantly lower than the aboveground index. 同一密度條件下,地下競爭指數(shù)明顯小於地上競爭指數(shù)。By raising questions concerning the key concepts related to restoration ecology,the actions and feedback mechanisms of belowground ec. 本文通過探討恢複生態(tài)學(xué)的關(guān)鍵概唸,從土壤、地下水循環(huán)、生物系統(tǒng)3個方麪探討了地下生態(tài)系統(tǒng)對生態(tài)恢複的作用機理和反餽機制。In biomass allocation, it partials to belowground mass when resource availability is low, otherwise it invests in overground mass. 生物量分配在資源可利用水平低時,偏曏於地下部分,否則資源更多的投資給地上部分; 返回 belowground