Influence and its benefits evaluation of removal lands from cultivation to afforestation and grassland in slope farmland on soil erosion in hilly region of purple soil;
紫色土丘陵区坡耕地退耕对水土流失的影响及其效益评价
The investigation and discussion on the situation of returning farmland to forest project in arid region in north of Pengyang;
对彭阳北部干旱片带退耕还林状况的调查与思考
Discussion on the problem of showing excessive enthusiasm on economic forest in returning farmland to forest.;
退耕还林中经济林比重过高问题的探讨
Research on Protecting Farmers Long-term Development and Consolidating the Results of Returning Farmland to Forest;
关于保障退耕农户长远发展与巩固退耕还林成果的研究
Current status and effects of carrying out conversion of cropland to grassland in Liaoning province are expatiated.
针对辽宁省退耕还草现状,阐述实施退耕还草成效,并依据当前退耕还草存在的问题提出了有关建议。
Investigation of Vegetation in Eucalyptus urophylla and Zenia insignis Models for Conversion of Cropland to Forest;
退耕还林尾叶桉模式和任豆模式的植被调查
Since the policies of the conversion of cropland to forest and the close grazing were carried out,the vegetation quality and coverage rate have been increased all over in Loess Plateau area, the eco.
退耕还林和禁伐禁牧措施实施以来,黄土高原地区植被覆盖率、质量已经呈现稳定提升的势态,民众生态环境保护意识增强,植被恢复措施优化,多元化投资与城镇化发展使黄土高原植被恢复前景较好。
Most of the researches on the benefit evaluation of the conversion of cropland to forest project focused on the ecological benefit evaluation by using the indexes such as water,soil,microclimate and ecological environment.
在目前退耕还林工程效益评价中,运用水分、土壤、小气候和生态环境等指标对生态效益进行评价的研究较多;在社会、经济效益评价时,主要是通过问卷调查的方式,对农村产业结构、农民户均收入、贫困人口数量、农民文化水平和受教育程度、农产品商品率、农民消费水平、恩格尔系数等指标进行分析,采用对比增量法得出评价结论。
Relationship between soil seed bank and aboveground vegetation in abandoned croplands on the Gullied-Hill Loess;
黄土丘陵沟壑区退耕地土壤种子库与地上植被的关系
The richness index(Margalef index),diversity indices(Simpson index and Shannon-Wiener index),Pielou evenness index,Sorenson index,Bray-Curtis index were used respectively to analyze the diversity of natural restoration vegetation communities in abandoned croplands in the hilly-gullied region of the Loess Plateau.
分别采用物种丰富度指数、多样性指数、Pielou均匀度指数J、Sorenson指数(Cs)和Bray-Curtis指数(CN)对黄土丘陵沟壑区退耕地自然恢复群落的多样性进行了初步研究。
Infiltration characteristics of soil and its influencing factors in abandoned farmland in the Hilly-gully region of Loess Plateau;
黄土丘陵区退耕地土壤水分入渗特征及影响因素