1) site fertilitydecline
地大衰退
2) soil degradation
地力衰退
1.
Soil degradation and sustainable management of Chinese fir plantation.;
杉木人工林地力衰退与可持续经营
2.
The soil degradation of Eucalyptus plantation was evaluated from water status, nutrition status and the integrated effect of plantation on water and fertility.
从桉树人工林的水分、养分状况以及人工林对水肥的综合影响上评述了桉树人工林的地力衰退表现; 进而, 以生物多样性作为关键因素, 分析了桉树人工林地上部分及土壤部分生物多样性的特点, 以及导致人工林生物多样性较低的原因, 从而提出制止桉树人工林地力衰退的 3方面的措施。
3.
The paper analyzed the cause and countermeasure of soil degradation and yield reduction of artificial fir plantation in recent years and its solutions, it was summarized that increasing wood yield need to pay great attention to the quality of artificial fir plantation, and improving soil power must attend to the selection, crop rotation and mixture of tree species and fertilizing of wood land.
分析了最近一段时期里人工杉木林的地力衰退及木材产量下降的原因并探寻解决的办法,得出要想提高木材产量就需要重视林地的质量,而提高地力就必须注意到树种的选择、树种的轮种、树种的混交及向林地施肥等因素。
4) regional depression
地区衰退
5) big slump
大衰退(暴跌)
6) decline of subsurface flow
地下水流的衰退
1.
The decline of subsurface flow in soil slope due to rainfall infiltration has been studied with numerical analysis.
对降雨停止后渗透坡面的地下水流的衰退过程进行了数值解析计算,做出了间歇降雨所产生的地下水位的形状图。
补充资料：地大
【地大】
（术语）四大之一。以坚因为性，以能持为用，周遍一切之物质，故云大。
（术语）四大之一。以坚因为性，以能持为用，周遍一切之物质，故云大。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条