有林地

河南省有林地面积动态变化及增加措施

Dynamic Chang and Measure of the Henan Forest Land Area

对有林地技术标准的理解

Understanding on Technical Standard of " Forest Land "

中国热带林业的几个基本数据：热带有林地总面积为1125.66万hm2；热带林分面积为1074.49万hm2；

The basic data of tropical forest in China are as follows : The total land area of tropical forest is 11.256 6 million ha .

顺昌县是重点林业县和竹林基地县。林业用地16.2万hm2，有林地面积15.2万hm2，其中竹林4万hm2。

As a major county of forest and bamboo base in Fujian province , Shunchang county has forestry land of 162 thousand hm2 , and about 152 thousand hm2 are covered with forest . 40 thousand hm2 of them are with bamboo .

本文根据哲盟1985和1994年两次全盟森林资源二类调查，全盟有林地从39.8万hm2增加到57.2万hm2，年净增1.92万hm2，森林覆被率由10.8%提高到16.7%。

Based on investigation of forest resources of the whole league in 1985 and 1994 , the forested area has increased from 0.395 million hm 2 to 0.572 million hm 2 , the forest coverage increased from 10.8 % to 16.7 % .

土壤碳磷比随剖面深度下降而降低，在40cm以下有林地和玉米地高于撂荒地和水稻田的趋势。

The C / P ratio decreased with the profile depth and tended to be greater in woodland and maize field than in fallow and paddy fields in layers below 40 cm .

有林地是研究区域景观的基质，其它各地类景观镶嵌其中。

Five altitude zones are plotted out in the study area .

有林地面积占国土面积的47.4%。

Forestland area is 47.4 percent of the whole national area .

与有林地相比，无林地受灾程度更为严重。

Compared with forest lands , non-forest land was more seriously damaged .

平原旱田、沼泽地和有林地是海伦市的3个主要景观类型。

Plain glebe , marsh and forest land are the three main landscape types .

西安地区丰水年有林地土壤水分恢复效应研究

Restoration effect of soil moisture content under woodlands in Xi'an region in wet year

有林地斑块边缘密度为145，反映有林地斑块边沿不规整。

The boundary density of forest land patch is 145 , reflecting an irregular boundary .

灌木林地和有林地的分布情况相似，数量均随海拔高度的增加呈上升趋势，但有林地上升幅度更大；

The quantity of shrubbery land and forest land is both increasing with the rise of elevation ;

有林地各植被类型小区均不产生水土流失现象；

No water and soil erosion occurs in the forest lands with different types of vegetation covers .

结果表明：有林地与无林地的景观连接度有明显差异，无林地的景观连接度普遍大于有林地；

The results showed that the landscape connectivity index of non-woodland was significantly higher than that of woodland .

林地中，有林地和其他林地面积减少，灌木林地面积增加。

In Woodlands , forest land area and other wooded land area decreased , shrub forest area increased .

2004年有林地比例恢复到37.4%，无林地面积比例为11.45%。

In 2004 , the proportion of woodland recovered to 37.4 % and no comparison is 11.45 % .

撩荒的采伐迹地磷的含量显著小于有林地；二代林中土壤磷含量与一代林无显著差异。

There is no difference of P content in larch plantation between the first rotation and the second rotation ;

土地利用变化以有林地和旱地的大面积减少和橡胶地的大面积增加为主要特征。

The main characteristic was a large decrease of forest and dry land , with a large increase of rubber .

有林地森林总蓄积及单位面积蓄积提高幅度在30%以上；

There is total the woodland forest store and the unit area store to raise the range above 30 % ;

生态公益林经营类型划分是针对有林地而言，其它林地不进行经营类型划分。

The management type classification of non-commercial forest is mainly against forest land , other forest land types are not included .

根据甘肃河西地区人工林的特点，提出了在调查方法上的特殊性；有林地和疏林地概念的理解；

Based on the characteristics of artificial forests of He'xi area in Gansu , particularity of investigation methods has been proposed .

在黄土高原小流域中，有林地比无林地的雨季径流深和径流系数小。

In the rain season , the runoff deep and coefficient of land of forest covered is smaller than no forest land .

其次，空气微生物总量方面，有林地（包括鼓楼广场）比无林地少23%。

Second , total amount air microorganism of woodland ( including the Drum Building Square ) was lower than woodless land by 23 % .

通过斑块面积及平均斑块面积指数可知1987年及1992年铜川市基质景观为耕地，2002年为有林地。

Plaque area and mean plaque area index showed the average land landscape matrix was farmland in 1987 and 1992 , and forest land in 2002 .

各土地利用类型的变化速度依次为其他林地水域疏林地未利用地灌木林地城乡用地有林地耕地。

The rate of change of land use was as followed : other woodland water open forest land unused shrub land Rural Land woodland arable land .

结果表明：无论是有林地还是无林地，地表径流系数随降雨量增大而增大。

The results show that ground runoff coefficient increases with rainfall , the ground runoff coefficient of forested land is less than that of non-forested land .

有林地面积少，森林覆盖率低，自然灾害严重，生态建设投入严重不足是这一区域生态环境存在的主要问题。

The present major entironment problems are decrease of forest area and forest coverage , serious natural disaster , and less investment of ecological environment construction .

山西省有林地仅占林地总面积的53.36%，发展空间还很大，随着国家退耕还林等政策的进一步稳定实施，林业能值产出将继续呈不断增加的趋势。

Acreage which has forest occupy 53.36 % in total woodland area , so forestry emergy will increase continually under the policy of reverting farmland to forests .

通过土壤资源评价，植被恢复之前矿渣废弃地的土壤肥力综合指数为8，对照有林地的为12。

Before the re-vegetation , the soil fertility composite index of slag wasteland is 8 and the contrasting area is 12 by assessment on the soil resource .