查询词典 water and soil

Tthe main causes of ecological degradation include irrational utilization and traditional economic modes which embodied population rapid growth, destroying forest and opening up wasteland, tillage in steep slope, excess graze, mangling trees, single tree variety, irrational utilizing land and low level industrial structure except for natural reasons such as water, soil and slope.

本论文依托于赤水市生态修复项目，从水土保持生态修复的概念出发，论述生态修复的理论基础，分析赤水市生态退化的机理，根据赤水市生态修复区的生态环境现状和生态修复试点县的经验，提出赤水市水土保持生态修复措施和修复模式。

The natural neutron flux measurement method can be used to predict the instantaneous change of atmosphere condition, and to determining the water content of soil and rocks and to predict earthquake.

通过对地－空界面天然中子流测量，可以揭示气象的瞬态变化、确定地表介质的含水率的关系，以及在地震预报与环境电离辐射评价方面具有重要的科学意义与实用价值。

Toilets are not available, ensure you dig a hole and bury night soil at least 100 meters away from campsites and water courses.

林子中没有厕所，如需大小便，要在离开营地和水源至少100米的地方。

An ecosystem is a community of different species interacting with one another and with their nonliving environment of soil,water,other forms of matter, and energy,mostly from the sun.

一个生态系统是不同物种以及非生命环境，土壤，水和其他形式的物质与源於太阳的能源在交互作用下所形成的一个社会。

To put the conservation tillage in practice in northeaster area of China and to realize the purpose of protecting water, soil, fertilizer and environment in dry farming and to speed the persistent development of agriculture .

为了在东北地区推广应用保护性耕作，实现旱区农业四保(保水，保土，保肥，保护环境)、促进农业可持续发展。

To put the conservation tillage in practice in Northeaster n Area of China and to realize the purpose of protecting water, soil, fertilizer and environment in dryfarming and to speed the persistent development of agriculture.

为了在东北地区推广应用保护性耕作，实现旱区农业四保(保水，保土，保肥，保护环境)、促进农业可持续发展。

1Institute of soil and water conservation, Chinese academy of sciences and ministry ofwater resources, Yangling Shaanxi 712100; 2Graduate school of Chinese academy of sciences, Beijing 100039; 3College of Resources and Environmental Sciences, Northwester

1中国科学院水利部水土保持研究所，陕西杨陵 712100；2中国科学院研究生院，北京 100039； 3西北农林科技大学资源环境学院，陕西杨陵 712100

On the basis of experiment results,and theory of soil water dynamics and solutetransport,mathematical models of NTT are established for the field conditions.

在试验的基础上，根据溶质运移理论及土壤水动力学原理，建立了田间条件下氮素运移与转化的数学模型，对田间淹水稻田和旱作农田中氮的运移、转化过程进行了数值模拟研究。

The results showed that the grain yield of winter wheat with two-irrigation was higher than that with one-irrigation with the same nitrogen application rate and method. Compared to one-irrigation,the grain number per spike in two-irrigation was higher,the 1000-grain weight was lower, the water wastage was higher, but the WUE was lower. The yield was not affected significantly by nitrogen rates and the methods. Within the nitrogen rate of 157.5-295.5kg/hm2, the lower NUPE and Nitrogen Productivity declined with nitrogen rate increasing. NHI was not lower than the others at the lowest nitrogen rate of 157.5kg/hm2. The accumulation of NO3--N in soil was significantly and positively correlated with the nitrogen application rate. NO3--N in one-irrigation was distributed mainly in the top layer (0-80cm), but it was inverse in two-irrigation.

结果表明，施氮量和施氮方式相同时春浇二水冬小麦的产量高于春浇一水，二水穗粒数较一水高，千粒重则低于一水，一水耗水量较少，水分利用效率明显高于二水；同一水分下不同施肥量及施肥方式对产量的影响差异不显著，同一施肥方式下在157.5-295.5kg/hm2范围内，施肥量越大，氮素生理效率和氮肥生产力越低，施氮157.5kg/hm2时，氮收获指数均处在最高或较高水平；土壤硝态氮残留量与施氮量呈显著正相关，成熟期一水条件下土壤中硝态氮主要集中在上层(0~80cm)，二水条件下则主要分布在中下层。

Limited by the spatial resolution, it is difficulty to extract small pieces of the distribution of soil and water conservation practices, such as terrace, orchard, grass, plantation land and dam land based on these images.

梯田、果园、人工林草地和坝地等水土保持措施呈小片状分布，由于受到分辨率的限制，不能有效提取。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。