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- mineral nitrogen in soil 土壤矿质氮
- Effects of different cultivation patterns of the dryland farming on the spatial-temporal variations of soil moisture and mineral nitrogen in soils 旱地不同栽培模式下土壤水分和矿质氮含量的时空变化
- 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。
- 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。
- 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。
- 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]
- 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
- 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。
- Mineral nitrogen content and accumulation in soil profiles under sunlight greenhouse cultivation 日光温室土壤剖面矿质态氮的含量、累积及其分布特性
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- The plants keep the nitrogen in their roots,legum . 植物将氮气保存在他们的根部。
- Influence of Vegetation Restoration Process on Mineral Nitrogen Accumulation in Soil Profile in Hilly and Gully Region of Loess Plateau--Sample with Zhifanggou watershed experimental area 黄土高原丘陵沟壑区植被恢复过程对土壤剖面矿质氮累积影响--以纸坊沟流域试验区为例
- Amounts of moisture in soil vary greatly. 土壤中湿度变化很大。
- If it were not for oxygen and nitrogen in the air, no man could live on the earth. 大气中如果没有氧和氮，人就无法生存于地球了。
- Urea is commonly used as the source of nitrogen in foliage sprays. 尿素作为氮素给源普遍地应用于叶面喷布。
- The seed may grow if you plant it in soil. 如果你把这种子种在土里,它可能会生长。
- Their role in soil has not been defined adequately. 它们在土壤中的作用还未充分肯定。
- A plant that thrives in soil rich in lime. 钙生植物生长于富含石灰质土壤中的植物
- The plant requires nitrogen in order to make proteins. 植物需要用氮来制造蛋白质。
