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

一般而言，灰化紅黃壤中鐵含量較高在线一级手机视频，淹水條件很易促發(fā)低地稻田鐵的毒害。

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.

就淹水程度對2組楓楊材年輪寬度、含水率的影響進行研究最新黄色网站在线观看。

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

此時土壤的含水量超過了田間持水量，在嚴重的淹水情況下一道本无码A√，土壤中空氣減少九一国产精品网站，會造成根系因缺氧而呼吸減弱，長時間如此還會引起植物死亡99久久一级做a爱全免费。

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

因此亚洲伊人天堂视频，在大田栽培管理中中国国产黄片AAAAA，要保證龍須草地的土壤含水量，在雨水過多的夏季要及時地放掉過多的積水日韩国内久久久久精品，防止淹水現象的出現毛片不卡在线网站。

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.

如果土壤含水量過高(90～100％)和過低(40～50％)，龍須草整個生育期沒有分蘗快速增長的現象9cao在线播放精品日韩，進入8月份人人caoshiping，甚至還出現分蘗死亡的現象，葉片的生長也受到很大影響桃花色综合影院，葉片總數極顯著地減少欧美粗大激情一级视频，葉片的長度縮短，長于或等于80cm的葉片根本沒有亚洲最大黄色网站免费，最終導致產量顯著降低老妇女淫秽网站；尤其是在6月份龍須草營養(yǎng)旺盛生長的時期，大田淹水極大地影響龍須草的生長超碰在线88二区，抑制分蘗的發(fā)生欧美熟妇激情视频在线播放，收獲時龍須草的總莖蘗數只有正常的一半。

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

S￣（2－）的生成速率隨施用田菁和稻草以及淹水而增加日屄视频自拍特写。

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.

三峽庫區(qū)消落帶土壤淹水的周期性常年變化人人爽人人操人人爱，勢必影響到土壤營養(yǎng)元素含量、土壤肥力www在线MM视频网站、土壤理化性質等土壤特性的變化(Ponnamperuma欧美69xxxxx，1972；李其林等欧美黄色视频免费播放，2004A片欧美日韩一区二区高清；楊剛，2004)又黄又爽又免费又猛视频，但土壤營養(yǎng)元素含量的影響是導致土壤其他特性發(fā)生相應變化的根本原因之一(金為民www.色色色.Ccom，2003；岳慶玲等青春草AⅤ视频在线观看，2007)一级全黄A片免费观。

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為甲醇可抽提態(tài)和不可抽提態(tài)殘留物，對甲醇可抽提態(tài)殘留物經TLC和紅外光譜分析表明亚洲视频女射18，其降解物為磷酸三酯老肥熟小旅馆老熟女口爆视频、N-去甲基久效磷、O免费看一级特黄aa大片软件，O-二甲基乙烯基磷酸酯亚洲熟妇丰满XXXXX小频，0-去甲基久效磷，以及O黄色视频欧美，C-去甲基久效磷一级片黄色强奸，但主要為磷酸三酯久久久久久精品免费免费直，其含量由母液中的5％增加到28—83％，這種降解過程中文字幕欧洲有码无码，在未滅菌土壤中比在滅菌土壤中快影音先锋下载资源在线资源免费下载。

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-淹水培養(yǎng)法測定了20種有機質婷婷四色六月、全氮和速效氮差異較大的土樣的土壤微生物量N欧美在线视频a免费观看。

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

探討淹水脅迫下香根草體內的生理變化規(guī)律。