硝态氮

化肥对大白菜维生素C及硝态氮含量的影响

Effect of Chemical Fertilizers to Content of Vitamin C and Nitrate Nitrogen on Cabbage

温室土壤pH值与露地土壤相比呈下降的趋势。在温室蔬菜不同生长季，随着番茄的生长，土壤盐分及硝态氮含量均呈增加的趋势，土壤pH值呈下降的趋势。

The electrolytic conductivity and nitrate content also increased and soil pH declined gradually with tomato growth in greenhouses .

在高施肥量条件下，硝态氮浓度达到高峰时，可使pH显著下降0.39个单位。

When nitrate concentrations reached the peak point under higher fertilizer , it could significantly descend pH by 0.39 units .

与相对应的非道路影响的自然区域相比，道路干扰显著降低土壤含水量和盐度，增加了pH和硝态氮含量。

Compared to non-road area , activities associated with roads significantly decreased soil moisture and salinity , and increased soil pH and nitrate concentration .

土壤原生动物与氮（主要是指氨态氮、碱解氮和硝态氮）有显著的相关性，说明土壤原生动物在土壤N的转化中起重要作用。

Result showed that there was significantly correlation between soil protozoa and soil nitrogen . Therefore , soil protozoan is important among the alteration of soil nitrogen .

淋溶液pH与硝态氮浓度呈负相关关系，与铵态氮浓度呈正相关关系。

PH of leaching water had a negative correlation with the concentration of nitrate content , and showed a positive correlation with the concentration of ammonium nitrogen .

其余土壤养分指标：有效磷、有机质、全氮、硝态氮和土壤pH总体来看，相对于对照样地土壤无较大影响。

Other indicators of soil nutrients : phosphorus , organic matter , total nitrogen , nitrate and soil pH had no great impact in general , professedly .

三种方法计算的A和B剖面水分渗漏和硝态氮淋失的结果比较一致，C剖面的差异性较大。

The results of water drainage and nitrate leaching calculated by three methods fit well with the observed data in profile A and profile B , but not with those in profile C.

溪流相邻高地通过地下径流向溪流中N素的输入，主要是以硝态氮的形态通过土壤水的输入；

N in the main form of nitrate through the subsurface runoff was put into the stream , the vegetation-covered riparian had high on the nutrient in the soil water .

研究结果表明，稻季渗漏水中总氮（TN）浓度随时间呈下降趋势，其中，硝态氮（NO3&N）由泡田初期的10mg。

The results showed that total nitrogen ( TN ) in natural leaching water declined significantly during the paddy season .

对研究区的土壤氮素和pH值进行克里格插值与绘图，结果表明研究区土壤的pH与硝态氮的空间分布格局极为相似，说明它们之间空间相关性较强。

Through the Kriging and mapping about the soil nitrogen and the pH value in the study area , the results indicated that distribution patterns of soil pH and nitrate were very similar .

研究结果如下：（1）四种森林类型土壤中铵态氮、硝态氮季节性差异显著（P0.05）。

The results showed that : ( 1 ) The seasonal contents of ammonium and nitrate nitrogen in soil have significant difference between the four forest ecosystems ( P0.05 ) .

利用~（15）N层标记的土柱试验法，研究了蔬菜和大田种植体系中菠菜、小麦两种作物及小麦的两个品种对土壤不同层次标记硝态氮利用的差异。

The difference on the utilization of labeled nitrate-N in different soil layers between two kind of crops , spinach and wheat , as well as two varieties of wheat was studied by means of soil column experiment .

鸡粪施用初期能迅速增加稻田田面水中铵态氮（NH4~+-N）和硝态氮（NO3~&N）浓度。

The concentration of Nitrate-N ( N03-N ), Ammonium-N ( NHZ-N ) in surface water from rice fields increased sharply after chicken manure application initially .

在相同灌水量下，随着氮肥施用量增加两个试验1m土壤中硝态氮储量均增多。

At the same water supply , the accumulation of nitrate in lm soil profile of field plot and column increased with higher nitrogenous fertilizer application .

AMS、NR酶活在打顶前后均以100%硝态氮处理最高，100%铵态氮处理最低。

The enzyme activity of AMS and NR was the highest and lowest with the application of100 % nitrate-N and100 % ammonium-N individually before and after topping .

氮素（N）是农作物产量的重要限制因子，铵态氮（NH4+）和硝态氮（NO3-）是植物从土壤中吸收的主要矿质氮源。

Nitrogen ( N ) is considered as an important limited factor of crop yields . Both ammonium and nitrate are the major sources of soil N for plants , however , ammonium is the predominant form of N in a paddy soils .

等于或者大于200kg/hm2的施氮量将超过小麦和多花黑麦草植株吸氮量，导致土壤不同土层硝态氮的大量累积，构成N淋溶的潜在危险。

N supply equal to or greater than 200kg / hm2 to exceed the application rate of wheat and annual ryegrass plant N uptake , It would resulted nitrate accumulated a lot in soil of different layers to form N leaching potential danger .

通过提高进水基质浓度，分别研究了氨氮和亚硝态氮浓度对ASBR厌氧氨氧化反应器脱氮性能的影响。

Effect of NH4 + and NO2-to nitrogen removal performance was studied in an ASBR by increasing substrate concentration .

经HPLC鉴定，黄瓜植株的根系分泌物主要含有草酸和柠檬酸两种有机酸，且铵态氮植株根系分泌物中柠檬酸含量显著高于硝态氮植株。

Two organic acids , oxalic acid and citric acid , were identified from the root exudates of cucumber seedlings by HPLC . Citric acid in root exudates of ammonium grown plants was significantly higher than nitrate grown plants .

以KNO3为入渗溶液，模拟研究了硝态氮在膜孔灌肥液自由入渗条件下的运移过程。

With solution for irrigation , the transport processes of nitrate nitrogen under film hole free irrigation with fertilizer was studied .

土层100～120cm中硝态氮的含量均不大于30mg／kg，未引起地下水的污染；

The nitrate content between 100 ~ 120 cm soil layer was no less than 30 mg / kgwithout causing pollution to the underground water ;

对土壤的理化性质、氨态氮、硝态氮含量以及对作物吸收Ca，Mg，K等养分和生长发育的影响与常规氮肥相似。

It is very similar to traditional N fertilizers used often to physical and chemical quality of soil , ammonium , nitrate and to the nutrients absorption of crop such as Ca , Mg and K etc as well as crop growing .

结果表明，烤烟烟叶中硝酸盐、亚硝酸盐和TSNA含量基本呈现出随肥料中硝态氮比例增加而增加的趋势；

The results showed that the nitrate , nitrite and TSNA content increased with the nitrate nitrogen content increasing in the fertilizer ;

采用封顶埋管法对贺兰山西坡不同海拔梯度上土壤铵态氮（NH4+N）和硝态氮（NO3-N）以及N净矿化速率进行了研究。

The Close-Top Incubation method was applied to study the variation of NH + 4-N , NO-3-N and net N mineralization at different altitudes on the western slopes of the Helan mountains .

相关分析表明：土壤全氮和硝态氮含量影响20cm土层中硝态氮的淋失量，三者之间呈显著正相关关系；

Total soil nitrogen content and nitrate content significantly influenced nitrate leaching amount from 20 cm depth soil , they had significant positive correlation .

土壤含水量高的情况下，二次淋溶45cm土层硝态氮含量最高，上层硝态氮几乎完全淋失。

When the soil water content is high , with second leaching to the soil , the .

在模拟过程中可同时得到销态氮垂直运移的弥散系数和平均孔隙水流速（averagepore-watervelocity）等参数。因此该模型可以直接用来确定农田土壤中硝态氮垂直运移的参数。

Compared simulating value of model with measured value , the error was below 3 % and relative coefficient was over 0 . 9 . The dispersion coefficient and average pore-water velocity of nitrate vertical transport in simulating process were also obtained .

到玉米收获时，土壤硝态氮的残留峰值已下移到200cm土层以下。

The accumulation peak of soil nitrate-N had moved down to soil layers bellow 200 cm under soil surface .

小麦对硝态氮主要吸收深度范围为0～80cm；

The depth that wheat absorbs nitrate is mainly in 0 ~ 80 cm of soil profile .