查询词典 soil conservation

Therefore, the general said: in soil bulk density reached 1.3g/cm3 or 1.4g/cm3 above or at the beginning of the areas of conservation tillage, in order to break the traditional farming for many years to form the bottom of the plow, the first year can be Subsoiling.

所以一般认为：在土壤容重达到1.3g/cm3或1.4g/cm3以上时或在开始进行保护性耕作的地区，为了打破多年传统耕作形成的犁底层，第一年可进行深松。

Vegetation construction of forests and grass for soil and water conservation is a process of natural formation of plant community and natural ecological restoration with the participation of humans.

林草植被建设是人工参与下的植物群落自然形成和生态自然修复过程。

Through strengthening natural forest conservation and nature re-serve management, continuing key eco-protection projects, establishing important ecosystems, and stepping up natural ecological restoration, by 2010 some 90 percent of typical forest ecosystems and key national wildlife species will be under effective protection; nature reserves will account for 16 percent of the national territory; 250,000 sq km of land suffering from water and soil erosion will have been improved; 300,000 sq km of land will have been ecologically restored; and 22 million ha of desertified land will have been put under control.

通过加强天然林资源保护和自然保护区的监管，继续开展生态保护重点工程建设，建立重要生态功能区，促进自然生态恢复等措施，到2010年，力争实现90%左右的典型森林生态系统和国家重点野生动植物得到有效保护，自然保护区面积占国土总面积的比重达到16%左右，综合治理水土流失面积25万平方公里，实施生态修复面积30万平方公里，治理荒漠化土地面积2200万公顷。

Soil and water conservation ; farmer households' behavior ; farmer households' off-farm work ; resources use ; Logistic model

水土保持；农户行为；农户兼业；资源利用； Logistic模型

Drainage ditch built with biological bricks is a new type of biological measure for soil and water conservation works.

生物砖排水沟是一项新型水土保持工程型生物措施。

The experiment of soil moisture conservation in summer fallow land in the years of1983～1984 indicated that the method to mulch.

1983年和1984年进行的夏闲地保墒方法试验表明，采用麦糠或麦草覆盖的方法可以在0～2m土层多保蓄土壤水分54～64mm。

Ecological restoration and soil and water conservation of spoil ground slope are the key projects of environmental protection in expressway construction.

高速公路弃土场边坡的生态恢复与水土保持是公路建设环境保护的重要内容。

The survey and management of Landslides is the important field in the catchment management, soil water conservation and hazard protection.

崩塌地的调查与管理是集水区、山坡地水土保持及灾害防治的重要课题，同时也是卫星遥测影像可利用的一个方向。

According to thermodynamic law of conservation of mass and energy and heat transfer theory, a group of differential equations on thermal balance of cover, thermal balance of indoor air, thermal balance of multi-layers of north wall, thermal balance of multi-layers of soil, thermal balance of multi-layers of north roof and thermal balance of plant were built.

该文建立了日光温室热环境模拟模型，定量描述了日光温室内的太阳辐射、对流换热、辐射换热、热传导、自然通风和水分相变带来的潜热对日光温室热环境的影响，根据质能平衡和传热学理论，得到一组关于覆盖物、室内空气、温室分层后墙、分层地面土壤、分层后坡和作物热平衡的微分方程组。

The paper puts forward corresponding measures for soil and water conservation.

对此提出了相应的水土保持措施。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。