灌溉

objectiveto provide the scientific foundation for the construction of gap cultivation bases of abrus mollis hance by evaluating the pollution status of soil and irrigation water in abrus mollis hance cultivation base.methodsthe environment quality was appraised by the nemerow pollution index method.resultsthe quality of soil and irrigation water was good, falling in the categories of "clean".conclusionthe quality of soil and irrigation water in abrus mollis hance cultivation base accords with the requirement of gap of chinese medicinal materials.

目的对鸡骨草种植基地土壤、灌溉水污染现状进行评价，旨在为鸡骨草规范化种植基地建设提供科学依据。方法土壤及灌溉水污染现状运用单项污染指数法和内梅罗综合污染指数法进行评价。结果种植基地土壤和灌溉水污染等级均属于&清洁&一级。结论鸡骨草种植基地的土壤和灌溉水质量完全符合《中药材生产质量管理规范》的相关要求。

The results showed that : three species all can resistant to drought ,wind-drift sand and endure to sterile soil, and with fine adaptability to local condition that there are irrigation in growth phase and no irrigation in post-vegetative phase in 2002 and there are no irrigation in growing period and irrigation in after bearing phase in 2003. Among the three species ,Agropyron cristatum× A.desertorum cv.

结果表明，在2002年生长期有灌溉和果后营养期无灌溉与2003年生长期无灌溉和果后营养期有灌溉的条件下，3种冰草表现出抗旱、抗寒、耐瘠薄的特点，对当地条件具有较好的适应性。

The research result showed that(1) The reclaimed water used didn't influence the sensory quality of a given turf grass tested;under irrigation of reclaimed water,Festuca arundinacea are the best,followed by Buchloe dactyloides and Zoysia japonica;(2) The influence of different types of irrigation water on growth characters of turfgrass is species-dependence;(3) Irrigation by reclaimed water and fresh+reclaimed water increases Na~+,CEC,and total porosity of the turf soil in comparison to fresh water,and improves soil quality.

结果表明：本研究使用的再生水对所供测试绿化草种的颜色、覆盖度、质地和均匀性无不良影响，再生水灌溉条件下，高羊茅表现出了最强的综合耐污能力，其次是结缕草和野牛草。灌溉水类型对于草坪草的生长指标的影响具有种的特异性。再生水灌溉和&清水+再生水&交替灌溉提高了土壤的阳离子交换量和总孔隙度，有利于土壤物理性状的改善。

The results show that because of saline water blending irrigation, the soil salt is cumulated, salification degree has positive correlation with irrigation water mineralization, soil sodium adsorption ratio increase and its impacted depths are different with mineralization degrees.

结果表明，微咸水灌溉后土壤积盐程度与灌溉水矿化度呈正相关；微咸水灌溉会使土壤饱和浸提液的SAR升高，且影响深度因灌溉水矿化度而异。

A compartmented soil-glass bead culture system was used to investigate characteristics of arsenic accumulation in iron plaque and in mature rice plants irrigated using water with arsenic in greenhouse.

采用土壤-玻璃珠联合培养的方式，选择2个氧化能力不同的水稻品种YY-1、94D-64和采自浙江富阳的土壤(砷的本底值为13.8 mg.kg-1)，并设灌溉清水和含砷水2个处理(即在分蘖期、拔节期、孕穗期、开花期和灌浆期5个生育阶段灌溉含砷污水，随灌溉水进入土壤中砷的浓度为3.2 mg.kg-1)，研究了砷在土壤-根表铁氧化物-水稻系统中的累积规律以及土壤和灌溉水对水稻秸秆和籽粒富集砷的贡献程度。

A compartmented soil-glass bead culture system was used to investigate characteristics of arsenic accumulation in iron plaque and in mature rice plants irrigated using water with arsenic in greenhouse. Arsenic was supplied as a solution of Na3AsO4·12H2O at the following stages: tillering, stem elongation, booting, flowering and grain filling.

采用土壤-玻璃珠联合培养的方式，选择2个氧化能力不同的水稻品种YY-1、94D-64和采自浙江富阳的土壤（砷的本底值为13.8 mg·kg-1），并设灌溉清水和含砷水2个处理（即在分蘖期、拔节期、孕穗期、开花期和灌浆期5个生育阶段灌溉含砷污水，随灌溉水进入土壤中砷的浓度为3.2 mg·kg-1），研究了砷在土壤-根表铁氧化物-水稻系统中的累积规律以及土壤和灌溉水对水稻秸秆和籽粒富集砷的贡献程度。

China is a large country of irrigated agriculture, in which the shortage of water resources is very serious. Due to the underdevelopment of economy, traditional irrigation such as border and furrow irrigation is still taken as the dominant way in farmland irrigation, which leads to the great waste of water resources.

我国是一个灌溉农业大国，水资源紧缺问题十分严重，但是由于经济欠发达，农田灌溉仍以传统的畦灌、沟灌等地面灌溉技术为主，水资源浪费现象还比较严重，因此，开展节水灌溉的研究势在必行。

Because of the relativity of water saving and the scale effect of water use,the paper suggests that the water saving potential at different scales and its changing should be analyzed in line with water balance at different scales to guaran...

由于节水灌溉的相对性和尺度效应，在采用节水灌溉技术和制定节水灌溉发展策略时，应该分析不同尺度节水的潜力及其相互影响，以保证投资的有效性，并达到田间、灌溉系统和流域尺度真实节水效果的一致。

DI is the most ideal irrigation indicator as it is very much influenced by soil water potential and less affected by meteorological factors. DI value of zero is probably the best irrigation threshold. MDS is strongly affected by meteorological factors and requires reference MDS under well-irrigated conditions. RT on the other hand is not significantly related with soil water potential. Therefore neither of these variables is suitable as irrigation index.

DI 受土壤水势影响产生变化的趋势明显并受气象因子影响较小，是最理想的灌溉控制指标，可将 DI =0作为灌溉控制临界值； MDS 受气象因子影响强烈，变异性较大，且需要充分灌溉条件下的 DI 作为参考， RT 与土壤水势的相关性不高，因此均不适合单独作为灌溉控制指标。

Super hybrid rice Gangyou 527 was used to investigate the effects of three irrigation regimes(submerged irrigation, dry cultivation, the treatment W2 that damp irrigation before booting stage, shallow irrigation at booting stage, wetting-drying alternation irrigation from heading stage to mature stage) and different amounts of N application on photosynthetic rate, activities of nitrate reductase, glutamine synthetase, glutamate synthase, endopeptidase in flag leaves, bleeding intensity in basal internodes and grain yield during grain filling, and studied correlations among the photosynthesis, nitrogen metabolism enzyme activity and root vigor at this stage.

以超高产杂交稻冈优527为材料，通过淹水灌溉、湿润灌溉＋浅水灌溉＋干湿交替灌溉（W2处理）和旱种3种灌水处理及不同的施氮量，研究水氮互作对结实期水稻剑叶光合特性、氮代谢关键酶及根系活力等生理性状和产量的影响，并探讨各生理指标间的相互关系。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了