1) regional depression
地区衰退
2) decline mine
衰退矿区
1.
The evaluation of the core competitive capacity of enterprises:A research on premise of decline mine transter;
企业核心竞争力评价:衰退矿区战略转移的前提研究
3) Dyingdowntown
衰退城区
5) 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。
补充资料：太平洋地区标准会议标准(见太平洋地区标准会议)
太平洋地区标准会议标准(见太平洋地区标准会议)
standards of PASC: see Pacific Area Standards Congress; PASC
Ta iPingyang Diqu Bioozhun Hu呼ib沁幻Zhun太平洋地区标准会议标准(s切md田心sofR巧C)见太平洋地区标准会议。
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