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- Topdressing nitrogen treatment had no obvious effect to total nitrogen in soil, but it had a stronger effect to alkalined-nitrogen. 追氮处理对土壤全氮没有明显的影响,但对土壤大麦碱解氮的影响比较大。
- Uncertainty Evaluation of Measurement Results for the Determination of Total Nitrogen in Soil Samples by Semimicro-Kjeldahl Method 半微量凯氏法测定土壤全氮量的不确定度评定
- total nitrogen in soil 土壤全氮
- The loss of nitrogen in soil always was the emphases of studying nitrogen loss. 摘要长期以来,氮素损失的研究重点多为氮肥在土壤运转过程中的损失。
- Total Nitrogen in Lubricating Oils by Modified Kjeldahl Method, Method of Test for (05. 用改良的基耶达法测定润滑油中总氮量的试验方法(05。
- With calcium chloride precipitant to eliminate the interference of PO43-, total nitrogen in compound fertilizer is determined by formol method. 用氯化钙作沉淀剂,消除磷酸根离子的干扰,用甲醛法测定复合肥中的总氮。
- By setting-up simulated mangrove wetland in a greenhouse,the behavior of total nitrogen in Avicennia marina simulated wetland system was studied. 在温室中建立红树林植物白骨壤模拟湿地系统,分别用正常、5倍和10倍浓度的人工配置的城市污水每周定时定量对模拟系统污灌2次,用海水作对照,持续1年。
- The study shows that the A/O Process can effectively degrade and eliminate the ammonia nitrogen and total nitrogen in Refinery Wastewater. 采用A/O工艺能够有效降解脱除炼油废水中的氨氮,出水水质可达到国家规定的排放标准。
- Total nitrogen (N) and organic carbon (C) in soil, forest floor and litterfall, and N mineralization rates were compared between pure and mixed Pinus luchuensis plantations on similar soils in the northern Okinawa Island, Japan. 对日本冲绳岛北部相同土壤条件下的琉球松纯林及其混交林的土壤氮素及有机碳素、地表凋落物量、枯枝落叶量以及土壤氮素矿化速率进行了比较研究。
- Known and unknown total nitrogen in water were measured by ionic chromatograph and GBl 1894-89 ultraviolet spectrophotometer. 采用紫外分光光度法和离子色谱法分别测定已知和未知总氮含量的水样。
- By means of dynamic lab-experiment, we simulate the migrating and transforming course of ammonia nitrogen in polluted river permeating in soil column. 方法通过室内动态实验模拟污染河流中的氨氮渗入地下后的迁移转化过程。
- The paper discusses problems in determining total nitrogen in water and puts forward some improvement measures which can control blank value in perfecter range. 本文提出了测定水中总氮时所遇到的几个问题及一些改进措施,从而可将空白值控制在较为理想的范围内,达到了环境监测的要求。
- Xiong Y,Li y M,Yin Z S et al.The transformation of nitrogen in soil and the effect on growth of flue-cured tobacco[J].Plant Nutr.Fert.Sci.,2003,9(4):500-502. [4]熊艳;李永梅;尹增松;等.;不同形态氮在土壤中的转化及对烤烟生长的影响[J]
- According to the situation of total nitrogen s increasing in the groundwater in Jilin City, the article analyses the distribution law of total nitrogen in space and time. 摘要针对吉林市城区地下水中总氮浓度逐年升高的现象,本文对总氮浓度在空间上和时间上的分布规律进行了研究。
- The amounts of ammonium nitrogen in soil by fertilizing the dicyandiamde(DCD) and NBPT-amended and the DCD and NBPT-amended large size granular of urea coated by starch acetate was the highest in all the fertilizers treatments. 硝化抑制剂DCD与NBPT混合涂层大颗粒尿素、醋酸酯淀粉包膜DCD与NBPT混合涂层大颗粒尿素的铵态氮含量最高;分别达到60.;22 mg kg-1土和59
- Furthermore, the linear regression equations of total nitrogen in pig urine and electrical conductivity (EC) provide reliable and accurate indication of total nitrogen content in pig urine. 分析中发现猪尿中总氮和铵态氮比例基本稳定 ,由此推想用电导率来预测猪尿中总氮的含量 ,获得了很好的效果。
- This paper reports the effect of DCD in seedling stage to soil microorganism of bacteria,mold and actinomycetes,and the concentration changes of both ammonium nitrogen and nitrate nitrogen in soil. 实验研究了双氰胺在玉米苗期对土壤微生物细菌、霉菌和放线菌的影响,及对土壤中铵态氮和硝态氮贮量变化的影响。
- The experiments in pot culture were conducted to study the effects of Anaerobic Fermentation Residues (AFR) on nitrate accumulation in rape and available nitrogen in soil in order to provide new way for the comprehensive utilization of biogas engineering. 研究沼气发酵产生的厌氧发酵残余物 (沼液、沼渣 ,以下简称沼肥 )在培肥土壤过程中土壤速效氮的变化及对油菜硝酸盐含量的影响 ,为沼气综合利用提供新的理论和技术依据。
- changes in soil organic carbon and total nitrogen contents 土壤有机碳氟的变化
- Amounts of moisture in soil vary greatly. 土壤中湿度变化很大。