查询词典 subdrainage

The effects of PVC subdrainage on the mineral nutrient uptake,dry matter accumulation as well as distribution,yield and quality of winter wheat in different ecological polder areas of Nanjing are discussed.

着重探讨了南方不同生态类型圩区农田埋设塑料暗管对小麦地上部分矿质营养吸收、干物质累积和分配、产量及品质的影响。

PVC subdrainage is one kind of advanced drainage techniques developed in recent years in the world. It will have a promising future of wide application.

塑料暗管是一种新型的排水材料，具有很好的排水效果，应用前景广阔。

This method can acurately simulate the flow direction in gird near river, and can keep the direction of waterflow from crossing the watershed of subdrainage area.

这样既可以较精确地反映出河道附近格网的水流方向，又可以让各个子流域内的汇流方向和水流方向不会跨越子流域的分水岭。

The moisture and salinization movement mathematical model in the field under subdrainage condition is based on the assumption of neglecting the effects of horizontal hydraulic gradient,It can analogy the changes of soil water content and salinization which are changed with times and depth.

论文在忽略水平方向水力梯度影响的假定下建立了排水条件下麦田水盐运移模型，模拟土壤水盐含量随时间、空间的变化情况。

The N fertilizer application under PVC subdrainage suggested that theamount of N fertilizer applied and ratio of bascal fertilizer to topdressing had con-siderable influence on accumulation and distribution of dry matter yield,uptakeand distribution of mineral nutrients such as N.P.K as well as grain yield.

塑料暗管排降条件下长江下游圩区小麦氮肥运筹试验结果表明，氮肥用量及基肥与追肥比例对小麦干物质积累和分配，矿质营养元素吸收和分配，籽粒产量有显著有影响。

This paper gave the detailed reviews on previousresearch results on subdrainage home and abroad,studied the effect and mecha-nism of subdrainage facilities on drainage,waterlogging reduction,salt removeas well as nitrogen fertilizer application under subdrainage conditions by use oflysimeter experiments and field trials.Numerical modelling on water movementin heterogeneons multilayered soils as well as the optimization layout of spacingsand depths of PVC subdrain was also investigated in this paper by numerical sim-ulations.

本文在论述国内外暗管排水研究进展的基础上，采用蒸渗仪控制试验，田间试验和数学模型数值计算相结合的方法，对塑料暗管的排水、降渍、除盐效果及其机理和塑料暗管排降条件下小麦的N肥运筹进行了深入研究，并对排降条件下试区非均质分层土壤水分运动的数值模拟和塑料暗管埋深和间距的经济优化布局模式进行了探讨。

PVC subdrainage is one kind of advanced drainage techniques developed inrecent years in the world.It will have a promising future of wide application incontrolling the threat of waterlogging,reclamating the lower—yield lands and re-constructing the lands with higher and stable crop yield in the lower reach polderareas along Changjiang River.

塑料暗管排水是世界上新近发展起来的一项高科技排水技术，对防止长江下游圩区三麦渍害，改造中低产田，建设高产稳产农田具有广阔的应用发展前景。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。