助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   black locust forest stands 的翻译结果: 查询用时:0.191秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

black locust forest stands
相关语句
  刺槐林地
     According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau,some key problems in the research of nutrient biogeochemical cycle have been discussed.
     根据对黄土残塬沟壑区刺槐林地养分循环的研究和实践 ,对有关养分生物地球化学循环研究中遇到的若干问题进行了讨论。
短句来源
  相似匹配句对
     The Cultivation Technique of Black Locust Nectariferous Forest
     刺槐蜜源林培育技术研究
短句来源
     The Dynamic Study on Transpiration Consumption of Black Locust Forest
     刺槐蒸腾耗水的动态研究(英文)
短句来源
     A Study on the Characteristics of Black Locust Firewood Forest
     刺槐薪炭林特性的研究
短句来源
     Management of black Locust (Robinia pseudoacacia L.) stands in Hungary
     匈牙利刺槐((Robinia pseudoacacia L.)林的经营研究(英文)
短句来源
     Influence of Black Locust Forest Improvement on the Water Situation of Forestland
     刺槐林更新改造对林地水分环境的影响
短句来源
查询“black locust forest stands”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
没有找到相关例句


According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau,some key problems in the research of nutrient biogeochemical cycle have been discussed.It is pointed out that in the processing of nutrient circulation flux measurement there exist some errors and problems,such as in the measurement of annual standing stock,nutrient returning amount with litter,nutrient returning amount with atmosphere input and rainfall eluviation action in...

According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau,some key problems in the research of nutrient biogeochemical cycle have been discussed.It is pointed out that in the processing of nutrient circulation flux measurement there exist some errors and problems,such as in the measurement of annual standing stock,nutrient returning amount with litter,nutrient returning amount with atmosphere input and rainfall eluviation action in the whole growth process.During the presupposition of model establishment,the influence of tree ages should be considered in the calculation of nutrient absorption amount.In the processing of nutrient efficiency using measurement,the higher estimation errors of tree nutrient utilization efficiency could be overcome with the revised Chapin index,which could really reflect the nutrient using condition in each growing stage of trees from the point of nutrient circulation utilization.

根据对黄土残塬沟壑区刺槐林地养分循环的研究和实践 ,对有关养分生物地球化学循环研究中遇到的若干问题进行了讨论。提出在养分循环通量的测算中 ,林木年存留量、养分随凋落物年归还量 ,及林木在整个生长过程中大气输入及雨水淋溶归还的养分测定都存在一定的误差和问题 ;养分循环过程的数学模拟假定中 ,养分吸收量的计算应考虑其受树龄的影响 ;养分利用效率指标的测算中 ,利用修正的Chapin指数 ,可克服对树木养分利用效率过高估计的偏差 ,并能从养分循环利用的角度真实反映树木各生长期对养分的利用状况

Using in suit artificial eroding trial, sediment yield of surface runoff was set as a measurement index to investigate the erosion resistance of different land types in Loess Plateau area, including black locust (\%Robinia pseudoacacia\%) forest stand, Chinese pine(\%Pinus tabulaeformis\%) forest stand, farmland, grass land and roadside slope. In the experiment, the effects of slope gradient, vegetation coverage and root system on erosion resistance were examined. The relativity...

Using in suit artificial eroding trial, sediment yield of surface runoff was set as a measurement index to investigate the erosion resistance of different land types in Loess Plateau area, including black locust (\%Robinia pseudoacacia\%) forest stand, Chinese pine(\%Pinus tabulaeformis\%) forest stand, farmland, grass land and roadside slope. In the experiment, the effects of slope gradient, vegetation coverage and root system on erosion resistance were examined. The relativity between flow rate of surface runoff and soil erosion resistances was also discussed. The results show that:1) the soil erosion resistances of different land types are ranked in decreasing trend as Chinese pine forest stand>black locust forest stand>grass land>roadside slope>farmland; 2) the effect of forest and/or grass on erosion control increases along with slope gradient decreasing; 3) soil erosion resistance increases when the land is covered with vegetation;4) the vegetation root system has an obvious function on erosion resistance in the case of small flow. Results suggest that the key factor for erosion control in Loess Plateau area is to spread around surface runoffs.

该文以晋西黄土区刺槐林地、油松林地、农地、草地、道路边坡为研究对象,用野外实地放水冲刷的方法,以地表径流含沙量为指标,研究了不同植被条件下土壤的抗冲性,并就坡度、地被物、植物根系对土壤抗冲性的影响,以及流量和土壤抗冲性的相关性进行了探讨.研究得出不同植被条件下土壤的抗冲性为油松林地>刺槐林地>草地>道路边坡>农地.林草措施的抗冲效果与坡度密切相关,且随坡度的增大林草措施的防冲效果变小;地被物对土壤抗冲性有显著影响,没有地被物的土壤抗冲性明显小于有地被物的土壤;植物根系对土壤抗冲性的影响与冲刷水流的流量密切相关,冲刷水流的流量较小时根系对土壤抗冲性的改善效果更为突出.黄土区水土保持的关键是分散地表径流.

 
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关black locust forest stands的内容
在知识搜索中查有关black locust forest stands的内容
在数字搜索中查有关black locust forest stands的内容
在概念知识元中查有关black locust forest stands的内容
在学术趋势中查有关black locust forest stands的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社