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- soil nitrate N content 土壤硝态氮含量
- BELANGER G,ZIADI N,WALSH J R,RICHARDS J E,MILBURN P H.Residual soil nitrate after potato harvest[J].Journal of Environmental Quality,2003,32:607-612. 郭胜利党廷辉郝明德.;黄土高原沟壑区沟坡地土壤剖面中矿质氮的分布特征[J]
- The vertical transport of soil water and nitrate N in main soil groups (yellow fluvo-aquic soils and Aeolian sandy soil) in Huang-Huai-Hai Plain was simulated by HYDRUS-1D model. 应用HYDRUS-1D模型对黄淮海平原的主要土壤(黄潮土和风沙土)中水分与硝态氮的垂直运移规律进行了模拟分析。
- The result showed that the soil available N content of the vineyard a low and in grade 5 while that was in grade 3 in the kaleyard. 结果显示:东丽区葡萄园的速效氮含量较低,处于5级;
- Nitrate reductases activity of leaves are increased under the mulching practices, while total N content of leaves is decreased, and the N absorption amount per 100 kg yields is reduced significantly. 覆盖可增强叶片硝酸还原酶活性,降低叶片中的全氮含量,显著降低每百千克产量氮肥吸收量。
- Li W Q,Zhang M,Li H F,Zan L S.The study of soil nitrate status in fields under plastic house gardening[J].Acta Pedologica Sinica,2002,39(2):283-287. [9]李文庆;张民;李海峰;昝林生.;大棚土壤硝酸盐状况研究[J]
- The increase amount of residual nitrate N from third harvesting to fifth harvesting was 51.6% of the total amount of applied nitrogen during this period. 从第三季作物收获到第五季作物收获,残留硝态氮的增加量占这一时期氮肥施用量的比例高达51.;6%25。
- Added S0 and DCD could inhibit nitrification of soil NH4+, decrease soil NO3--N content, and maintain a high soil NH4+-N content within 72 days at NH4HCO3 treatment, and within 48days at urea treatment. S~0、DCD及其组合施入土壤可抑制NH_4~+向NO_3~-的转化,降低土壤NO_3~- -N水平,使土壤内NH_4~+ -N长时间保持较高水平。
- Based on the long-term field experiments, the relationships between soil nitrogen balance, nitrogen utilization efficiency (NUE) and soil nitrate were studied. 摘要 利用长期肥料试验资料研究了土壤氮素平衡、氮肥利用率和土壤硝态氮之间的相互关系。
- In contrast,the nitrate?N contents of the two vegetables decreased obviously,being 29.7% and 19.4% for spinach,and 22.5% and 25.0% for Chinese cabbage. 而菠菜的硝态氮含量却分别降低29.;7%25和19
- The promotion effect of the mycorrhizal inoculation on the N content of root、stem and leaf was disappear. 适量施肥有利于菌根接种苗叶中脯氨酸含量与可溶性糖含量增加,提高苗木抗旱性。
- In the each stage of the cotton growth remnant of soil nitrate nitrogen was higher, but loss of apparent budget of soil nitrate was higher only in the seedling stage and the beginning of bell stage. 棉花生长发育的各个时期土壤硝态氮的残留都很高,但仅在苗期、初铃期表观损失较高。
- Ye Y L,Li L,Sun J H,Zhang F S.Effect of root separation on pl ant nitrogen uptake and soil nitrate nitrogen residual in faba bean/maize intercropping[J].J.Soi1 Water Conserv.,2005,19(3):13-17. [19]叶优良;李隆;孙建好;张福锁.;地下部分隔对蚕豆/玉米间作氮素吸收和土壤硝态氮残留影响[J]
- The thermal decomposed mechanism of orthorhombic ammonium paratungstate,(NH4)10H2W12O4210H2O,was investigated by DAT,XRD and analysis of N content. 用热分析、X射线衍射及N含量分析研究了三斜仲钨酸铵(NH4)10H2W12O4210·H2O的热分解机理;
- Because the nitrogen is much cheaper than the argon,when melting the steel without strict N content,the all time nitrogen stirring can be used. 由于氮气与氩气相比有较强的成本优势,在冶炼对氮含量要求不苛刻的钢种时可以采用全程底吹供氮。
- Mycorrhizal infecting rate, soluble sugar, soluble protein,and N content of host plant were promoted by inoculation AM fungi under N-applied levels. 接种AM真菌提高了丹参根系菌根侵染率,叶片可溶性糖、可溶性蛋白和植株全氮含量;
- The N content CV values obtained from the 3 laboratories in 11 samples were higher(P<0.01) with Kjekldahl method than those with Dumas combustion method. 11种饲料样本在3个不同实验室间测定值的平均CV值表现为燃烧法明显小于(P<0.;01)凯氏法。
- Field quick testing method of soil nitrate 土壤剖面硝态氮含量的快速测试方法
- Cattle manure application could decrease nicortine and total N content, while to increase the content of Cl, toatl sugar and deoxidize sugar of tobacco leaf. 施用牛圈肥有降低中部和下部烟叶烟碱和总氮含量的趋势,而总糖、还原糖则有增加的趋势;
- Nitrate N Accumulation in Vegetable Soil in Guanzhong Area of Shaanxi Province 陕西关中地区蔬菜地土壤的NO_3-N累积