过量灌溉

Two kinds of irrigation strategies, including irrigation up to field capacity and fixed amount based on soil texture, were employed with bubbler irrigation system.

结果表明，传统灌溉方式下，优化氮素处理保证了番茄产量，与传统氮肥处理相比，追施的氮肥数量减少了48%；在番茄的主要生育时期内，采用每次灌溉至田间持水量及固定灌额处理的灌溉量分别比传统灌溉处理减少46%和30%；采用同样指标所推荐的氮肥追施数量也分别减少14%和10%，明显减少土壤–蔬菜体系中氮素的表观损失，减轻了由于过量施氮而对环境造成的影响。

The selection of N-catch crop and the capacity of nitrate extraction from deep soil layer by catch crop were reviewed in the paper. It also pointed out that combining with N-catch crop in the rotation system had been regarded as a good approach for safe vegetable production.

过量施用的氮肥在自然降水或灌溉水的作用下，可通过径流损失造成地表水水体的富营养化；部分土壤中的NO-3 N可随水向下迁移污染地下水，在地下水环境中仍主要以硝态氮形式

This sometimes occurs in response to scalping, or over or under-irrigating.

这可能是由于"剔头"或者，灌溉不足或过量造成的。

Over-application of N fertilizer is 128 kgNha-1 for corn in bottom land where the irrigation could be done in north Shaaxi, 21 kgNha-1 for rice in south Shaanxi, 55 kgNha-1 for wheat and corn in Guanzhong.

结果表明，粮食作物生产中氮肥用量和变幅都很大，一季作物氮施用量范围为106-636 kgha-1；与试验结果和推荐量比较，过量施氮在陕北川道地灌溉玉米为128 kgha-1，陕南水稻21 kgha-1、关中小麦55 kgha-1、玉米56 kgha-1。

The edge of Tarim basin of south Xinjiang is one of the most important cotton production regions in China.

塔里木盆地边缘绿洲是中国重要的棉花产区，不合理的灌溉制度和过量施氮是目前该地区高产棉区中普遍存在的问题。

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。