The change of agglutinating activity, cd spectrum and fls of lra in different temperature, ph and different chemicals indicated that lra had partial hemagglutinating activity at ph2. 0 ( 50 % ), a temperature above 100 ( 60 % ) and after modified by n - bromosuccinimide ( mbs ), the activity lost completely, modified by depc, the lra had a little activity, the other groups modified such as arg, tyr, glu, asp did n ' t effect the hemagglutinating activity of lra. the result indicated that trp residues were essential to the hemagglutinating activity and were involved in carbohydrate - binding site
研究不同溫度、 ph和基團特異性化學修飾后lra凝血活性和促
淋巴細胞有絲分裂的變化、圓二色譜和熒光光譜的變化，當溫度達80以上時，活性開始下降，到100時活性有60 %保留:當ph為2時，活性保留50 % ， ph為4一12對活性的影響不大;用nbs修飾trp后， t即的旦一叫睬基的破壞使活性完全喪
失，表明trp對凝血活性是至關重要的， arg 、 tyr 、 glu 、 asp被修飾后， lra的凝血活性並未受到大的影響，但tyr修飾后lra的促有絲分裂活性降低
Soon the rate of fluid loss exceeds the ability of the lymph channels to withdraw it.
不久液體丟
失量即超過
淋巴管運輸的速度。
The dynamic change of nh4 +, no3 - and tn, under the situation which urea was applied in the high fertility paddy - field in yuhang of hangzhou city with a lysimeter which was designed and made by ourselves, was studied and analyzed in order to find the rules of the change in the water - body of surface and the leakage rule of nitrogen, to reduce the effect of nitrogen loss on the water pollution
藉助自行設計製作的稻田滲漏計，在杭州餘杭對高肥力稻田不同施用尿素氮肥情況下，稻田地表水和滲漏水中銨態氮、硝態氮和總氮（簡稱三氮）的動態變化規律進行了研究分析，以利於發現氮素在地表水體變化和
淋失規律，盡量減少氮素
淋失對地下水體所造成的影響。
It would appear that the inputs are insufficient to offset the mobilization and leaching of calcium from the topsoil.
鈣的轉入量看來不足以補償從表土中活化和
淋失的鈣。
Denitrification, on the other hand, can be very serious with a combination of no tillage and imperfectly drained soils
硝態氮的
淋失雖然在免耕制下稍高一些，但在夏季作物上，一般不是氮損
失的主要途徑。
Nevertheless, use of soil incorporation for urea and anhydrous ammonia to reduce volatilization, the practice of delaying nitrogen fertilizer application in imperfectly drained soils to minimize denitrification and leaching, and patience in the case of immobilization will tend to resolve all these problems
但是，採用把尿素和液氨和土壤摻混施用以減少氨揮發，在排水不良的土壤上採取延遲施氮期的辦法以減少反硝化及
淋失，以及對于氮固定問題採取耐心克制的態度，這些問題就都能得到解決。
Application of nitrogen leaching losses mixed simulative model in tile effluent from the drained paddy rice field
暗管排水稻田中氮素
淋失動態混合模型及應用
The studies show that the discharge of liquid manure and the run - off loss of solid manure deposited in the open air are the main environment problems in livestock production
研究表明，牲畜養殖中液體糞水的排放和露天堆放固體糞便的
淋失易造成環境問題。
Nitrogen leaching in soil and recommendation of nitrogen and irrigation
冬小麥土壤無機氮
淋失規律及灌水施氮量的推薦
Over - irrigation not only wastes water but could result in leaching of fertilizer ( primarily n ) below the root zone
過量灌溉不僅浪費水資源而且還可能引起肥料向根區以下的
淋失（主要是氮素） 。
It is apparent that a high degree of ammonia volatilization and / or nitrate leaching can occur in cropping systems susceptible to previously described conditions
很明顯，高的氨揮發和（或）硝態氮的
淋失會發生在符合上述條件的任何種植制度中。
Leaching of no3 - - n with different fertilizer sorts can be divided into three stages : equilibrium, ascending, descending
應用方程iny : = a + blnt可擬合鉀肥在磚紅壤中120em處的
淋失過程。
Nutrients that are mobile in the soil profile must be supplied near to the time of maximum need in humid regions in order to prevent loss
在濕潤地區，為防止養分
淋失，應將移動性強的養分在接近最需要的時候施用。
Factors such as soil texture, landscape, climate, irrigation, crop type, and nitrogen management influence intensity of no3 - loss through leaching
土壤質地、地貌、氣候、灌溉、作物類型和氮素管理等因素影響到
淋失的強度。
( 3 ) the amount of nitrogen leached was in the decreasing order as no3 - fertilizer > urea > nh4 + - fertinzer, and the main form of n leached was the n fertilizers added. the amount of nitrogen leached from sand soil exceed in that from clay soil
（ 3 ）在滴灌施肥條件下，三種氮肥（硝態氮、銨態氮和尿素態氮）在兩種質地的土壤中的
淋失量均是硝態氮肥尿素銨態氮肥，
淋失的氮素主要為肥料氮。
There is an increasing interest in reducing n losses from the agriculture soils major reason is the rapid increase in the number of polluted groundwater reservoirs in many countries. to obtain more detailed information about n process in agriculture soils, nondestructive measurement techniques with high spatial and temporal resolution are needed
氮素
淋火引發了越來越多的社會和環境問題。為了得到更詳盡的硝態氮在各因素影響下的
淋失機理，需要一種對土壤破壞程度低，具有高度時空性的測定技術。
To increase the fertilizer utilization in the latosol, studying the fertilizer leaching and conversion characteristic, such as leaching velocity reaching amount, conversion path etc, seem to be extremely important. however, hitherto the study of fertilizer nutrient leaching characteristic are scanty, only some on the mineral nutrient derived from latosol
要提高化肥在磚紅壤中的利用率，研究其
淋溶及轉化特徵則顯得極為重要，如
淋失速度、
淋失量、轉化途徑等，然而迄今為止，在磚紅壤上這方面研究報道較少，且主要是針對磚紅壤中礦化出來的營養元素，而缺乏對化肥在磚紅壤上
淋失特徵的研究。
The objective of this study was to estimate the losses of nutrients in the labgoratory by leaching soil columns containing disturbed soils, measuring the impact of different quantity fertilized applied. different fertilizer sorts and plant system, establishing the comparative model. evaluating fertilizer leaching tendency
本研究通過室內土柱模擬和盆栽試驗，探討不同施肥量、肥料品種以及種植模式等對化肥在磚紅壤上淋失的影響，並建立相應模型，預測肥料養分在磚紅壤中的損失趨勢。
