淹水

Basically red yellow podzolic soils are rich in iron and soil submergence easily promote iron toxicity in lowland rice.

一般而言，灰化红黄壤中铁含量较高，淹水条件很易促发低地稻田铁的毒害。

Two groups of wood(wet and air-dry wood) were tested to investigate the effects of flooding on the moisture content and ring width of Pterocarya stenoptera.

就淹水程度对2组枫杨材年轮宽度、含水率的影响进行研究。

When soil water content exceeds field capacity, the reducement of air in soil will cause the root breath weaken, or plant death.

此时土壤的含水量超过了田间持水量，在严重的淹水情况下，土壤中空气减少，会造成根系因缺氧而呼吸减弱，长时间如此还会引起植物死亡。

Sabaigrass had long time for vegetative growth and required enough nutrients, so fertilization can promote growth significantly.

因此，在大田栽培管理中，要保证龙须草地的土壤含水量，在雨水过多的夏季要及时地放掉过多的积水，防止淹水现象的出现。

The study results indicated: The growth and output of the Sabaigrass was in orderon condition that soil holding water ratio was between 70% and 80%. The segregatingbranch of Sabaigrass have not grow rapidly in the procreative period when the soilheld higher(90～100%) or lower water (40～50%), and in August the death ofsegregating branch appeared.The growth of laminae was also impacted, the quantityor length of laminae, even shorter than 80cm. Finally with the result that the outputdecreased evidently.In June, the nutrition blooms in this time, the growth ofsegregating branch of Sabaigrass was affected by the field waterlogging, the caudexand segregating branch were half less than in the normal condition.

如果土壤含水量过高(90～100％)和过低(40～50％)，龙须草整个生育期没有分蘖快速增长的现象，进入8月份，甚至还出现分蘖死亡的现象，叶片的生长也受到很大影响，叶片总数极显著地减少，叶片的长度缩短，长于或等于80cm的叶片根本没有，最终导致产量显著降低；尤其是在6月份龙须草营养旺盛生长的时期，大田淹水极大地影响龙须草的生长，抑制分蘖的发生，收获时龙须草的总茎蘖数只有正常的一半。

The rate of 35 S2- formation greatly increased with incorporating sesbania and rice straw or with flooding of soils.

S￣（2－）的生成速率随施用田菁和稻草以及淹水而增加。

Through simulated soil dynamic submergence in the hydro-fluctuation belt of the Three Gorges Reservoir Region,four different kinds of water treatment were applied to examine the mechanism of the nutrient changes in soils of Taxodium distichum seedlings.

三峡库区消落带土壤淹水的周期性常年变化，势必影响到土壤营养元素含量、土壤肥力、土壤理化性质等土壤特性的变化(Ponnamperuma，1972；李其林等，2004；杨刚，2004)，但土壤营养元素含量的影响是导致土壤其他特性发生相应变化的根本原因之一(金为民，2003；岳庆玲等，2007)。

Their half lives were 27.29 and 69.16 days respectively. Monocrotophos degraded into both methanol extractable and unextractable residues in the submerged soil.The analysis of 14C-methanol extractable. residue by TLC and ARG indicated that degraded products of monocrotophos were triether phosphate,;N-de-methyl Azodrin, O, O-dimethyl-vinyl-phosphatc,O-demethyl Azodrin,and O, C-demethyl Azodrin.The principal degraded extratable product of monocrotophos was triether phosphate, which incresed from 5% of the parent solution of monocrotophos to a range of 28-83%, furthermore and its degradation process was much faster in the unterilized soil than in the sterilized soil.

久效磷在淹水土壤中降解为甲醇可抽提态和不可抽提态残留物，对甲醇可抽提态残留物经TLC和红外光谱分析表明，其降解物为磷酸三酯、N-去甲基久效磷、O，O-二甲基乙烯基磷酸酯，0-去甲基久效磷，以及O，C-去甲基久效磷，但主要为磷酸三酯，其含量由母液中的5％增加到28—83％，这种降解过程，在未灭菌土壤中比在灭菌土壤中快。

Two techniques were compared that uses the UV absorbance at 280nm of 0.5mol/L K_2SO_4 extracts of fumigated and unfumigated soils and fumigationwaterlogged incubation to estimate the concentrations of nitrogen in the SMB.

用氯仿熏蒸-0.5mol/L的K2SO4直接浸提，280nm紫外比色法和熏蒸-淹水培养法测定了20种有机质、全氮和速效氮差异较大的土样的土壤微生物量N。

The aim of the study was to discuss the physiological change law in Vetiveria zizanioides under waterlogging stress.

探讨淹水胁迫下香根草体内的生理变化规律。

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。