沟底

针对沟灌，研究了沟底起伏状况和沟横断面形状的空间变异性对灌水质量的影响。

This paper aims at examining the influences of spatial variability of furrow sole fluctuation and cross-section shape on furrow irrigation performance .

夏秋季节，日平均土壤CO2释放速率最大的样地均为沟底沙棘群落样地，最小的样地均为沙地；

In the summer and autumn , the maximum of diurnal mean CO_2 flux all occurred in Form . Hippophae rhamnoides , and the minimum in sandy land .

沟底土壤湿度有所好转，为7.7%。

Gully floor had relative higher soil moisture of 7.7 % .

沟底膜孔灌水条件下土壤水入渗规律的数值模拟

Numerical simulation of soil water movement under condition of film hole irrigation

我还想象到，从木板上掉到沟底，是非常惨的，那与掉到平地上，一点也不一样。

It is totally different from falling on the ground .

世界目前正处在半个世纪以来最严重的经济衰退的沟底。

The world is scraping Bottom in the deepest economic slump in a half-century .

儿子看了看黑乎乎的沟底，立即傻了眼。

Looking at the black bottom of the ditch , his son felt dizzy .

田间道多设置在沟边、沟底或山峁的脊梁上。

Field road is usually set beside the gutter , deep in ditch or on the mountain ridge .

并应用模糊综合指数法对区内土壤养分状况进行评价，表明河谷川道区及部分沟底地土壤养分充足；

The results showed that the nutrient level of the soils in valley and the bottom of some gullies is higher .

阐述田间试验测出水田沟底不平度及其自相关和功率谱密度分析；

In this paper , the hardpan roughness of paddy field was measured , autocorrelation and power density spectrum were analyzed .

试验研究提供了水田沟底不平度变化范围以及可以实用的插秧机液压仿形系统的仿形频次。

The study provided the variation range of paddy field hardpan roughness and the effective frequency of the hydraulic copying system .

不知是在寻找沟底的细微食物，还是贪那深深的水里的寒冷。

Perhaps they were searching for morsels of food on the stream-bed ; or maybe they sought the chill cold of the deep water .

本文用牛顿法解旋耕作业参数的代数方程，并通过计算机较准确地求出沟底不平度值。

An accurate solution for the roughness values of the furrow bottom is obtained by the Newton 's method for the solution of algebraic equations with a computer .

皓月当空，微风轻轻拂过沟底。小彼得永远也不会像这样听爷爷拉琴了。

The silver moon was high overhead , and there was a gentle breeze playing down the gully . he 'd never be hearing granddad play like this again .

潮沟底和潮沟边滩等特殊生境的存在，提高了淤泥质河口潮滩的生境异质性，说明了潮沟系统在维持河口生态系统底栖动物物种多样性中的重要作用。

Specific habitats such as the bottom and bank of creek increased habitat heterogeneity of estuarine tidal flat , and played an important role in maintaining species diversity in estuarine ecosystem .

金沙江下游区，要完善小流域治理措施配置，重视沟底林建设和考虑修建拦沙工程或具有拦沙效益的水利水电工程。

In the lower Jinsha river , watershed management treatment should be perfected , reforestation on gully bed should be strengthened and sediment retention dams or hydro power projects with sediment reduction benefit should be paid attention .

不同环改方法控制螺情的近期及远期效果不一致，以沼泽地改塘效果最稳定，其次为沟底及两侧石砌并用水泥磨面的方法。

The recent and long term effect for snail control was inconsistent among different methods of modification , the effect of changing swamp into pond was the most stable , the next was the method of building ditch with stones and smoothing surface of both sides and bottom with cement .

沟道的底要平。

The channel must have a flat bottom .

农田氮磷通过降雨击溅侵蚀、排水沟坡面和沟底冲刷进入地表径流。

Rain splash erosion , loss of topsoil from slope and bottom of farm furrow resulted in the entrance of N and P into surface runoff .

结果：味孔多分布于轮廓乳头环沟侧壁下部近沟底处，呈卵圆形或圆形，味孔下方为味小管，呈漏斗状或管状，管底部中央有圆形小孔。

Results : Taste pores were ellipse or round and located in the lower half of circumvallate papillae trench wall , especially near the base of it .

切沟不同部位土壤水分的季节和年际变化主要受降雨入渗补给影响，而沟底则与径流的产生有关。

For the gully floor , soil water content was influenced by the runoff generation besides rainfall supply .

沟坡立地类型组占了该流域面积的一半多，达到61.13%，说明在纸坊沟流域中，立地主要以沟坡立地类型组为主：③沟底立地类型组占整个流域面积的2.16%。

Gully bottom site type group accounts for 2.16 % of the whole watershed area .