天然草地

天然草地牧草营养成分含量受生育期影响，随生长季节变化呈逐渐下降趋势。

Nutrient content of the herbage on the rangeland is affected by growing period and decreased with changes of the growing season .

上世纪七、八十年代以前，新疆畜产品70%～80%源于天然草地，草地畜牧业曾经为新疆国民经济发展和人民生活做出过重大贡献。

Before the 70s-80s of last century , about 70 % - 80 % of animal products comes from nature rangeland . The grassland animal husbandry provided an important contribution to national economic development and people 's life of Xinjiang .

应用EM在天然草地牧草增产试验

Test of Increasing Forage Production in Natural Grassland Using EM

环青海湖地区天然草地TM影像植被指数分析

An Analysis of Natural Grassland TM Images Vegetation Index in the Region around Qinghai Lake

在地面同步测产的基础上，根据从MODIS资料提取的植被指数和地面草产量之间的相关关系回归出阿勒泰天然草地的遥感估产模型。

The correlation relationship between the normalized difference vegetation index from MODIS and the yield of grassland was regressed .

北疆区域耕地的NDVI值呈增加趋势。天然草地、林地的NDVI表现出明显的减少趋势。

NDVI value of the cultivated land had an increasing trend , while the NDVI of natural grassland , forest presented a declining trend .

新疆天然草地面积辽阔，近年来，每年夏季的蝗灾发生面积都在230万hm2以上。

There is wide natural grassland in Xinjiang . Acreage of locust disaster covers at least 2 , 300 , 000 hm2 in the summer during these years .

30～20cm天然草地和灌木林地的有机碳密度普遍偏高，而农地、果园和人工草地则均较低；

The organic C density of natural meadow and bush forest land is higher than farmland , artificial meadow and orchard at large in 0 ~ 20 cm ;

由于沙棘的改土作用及林地枯枝、落叶的蓄水作用，沙棘林地1～1.5m土层土壤水分恢复较好，可超过或接近荒山天然草地。

Due to the soil improvement by Hippophae rhamnoides and the water retaining by litter , the soil moisture of 1 ~ 1.5 m layer could be easy to restore .

典型草原撂荒地Shannon-Wiener多样性指数的平均值为1.5481，是天然草地的55%，草甸草原带撂荒地Shannon-Wiener多样性指数的平均值为1.3492，是天然草地的50%。

The average of Shannon-Wiener diversity index was 1.5481 in typical steppe abandoned land , which was only 55 % of natural grassland , while it was 1.3492 in meadow steppe abandoned steppe .

培养试验表明，在温度水分相同的条件下，天然草地转变为农田后低了土壤吸收CH4和排放N2O的能力，CH4的吸收量和N2O的排放量随开垦年限的增加呈现降低趋势。

Incubation experiment showed that : under the same conditions of water and temperature , the CH4 uptake and N2O emission were reduced significantly after grassland was changed into cropland , soil CH4 absorption and N2O emission decreased with cultivation years .

而20～40cm和0～40cm的土层内土壤有机碳密度相比之下灌木林地、农地和天然草地相差不大，而果园和人工草地相对较低。

While the organic C density of natural meadow , bush forest land and farmland is higher than artificial meadow and orchard in 20 ~ 40 cm and 0 ~ 40 cm .

新疆天然草地牧草资源种类与数量特征

Species and Quantitative Feature of Natural Grassland Herbage Resources in Xinjiang

基于信息熵的天然草地综合评价的模糊物元分析法

Fuzzy Matter Element Analysis of Grassland Types Based on Information Entropy

山西天然草地禾本科植物资源与利用

Resources and Utilization of Grasses of Natural Grassland in Shanxi Province

民勤县天然草地毒草调查与防治

The investigation of poisonous weeds on natural grassland in Minqin County

青海天然草地属性及适宜性利用对策的探讨

The Natural Grassland Property and Its Suitable Utilization Countermeasures in Qinghai

天然草地放牧绵羊的营养需要与草地供应

Nutritional requirements and grassland supply for sheep grazing on natural grassland

临夏州天然草地资源永续利用对策

Counter-measures to enduringly use the natural grassland resource in Ningxia prefecture

贵州天然草地资源的自然特征和评价

Characteristics of natural grasslands in Guizhou Province and it 's evaluation

青海省海南州天然草地生态系统服务功能价值评估

Evaluation of grassland ecosystem services of Hainan Prefecture in Qinghai Province

环青海湖地区天然草地土壤水分动态研究

Studies on Soil Moisture Dynamics of Natural Grassland in Qinghai Lake Region

兵团农九师161团天然草地牧草资源及其饲用评价

On the Natural Grass Resources and Feeding Value of State Farm NO.161

福建省天然草地有毒有害植物调查

Investigations on poisonous and harmful plants of natural grassland in Fujian province

民勤天然草地资源及其管理利用

Natural grassland resources and its management and utilization in Minqin

新疆天然草地有毒植物及其防除与利用

The utilization and control of harmful plants in nature pasture of Xinjiang

山西天然草地主要有毒植物

The principal poisonous plants on native grassland in Shanxi Province

基于投影寻踪的天然草地分类模型

Classification model of natural grassland quality based on projection pursuit

青南地区退化天然草地综合复壮技术研究蕨的人工有性繁殖及复壮技术

Study on comprehensive rejuvenation technology of degeneration natural grassland in Qinghai-south region

与利用天然草地的另类资源&土壤微生物

Contributions of the soil microorganisms of natural grassland as another natural resources