Under base employ of the coated urea, the total N concentration of farm surface water was near the contract level, and the possibility via runoff was very little.
结果表明，包膜尿素在基施情况下，田面水总氮浓度始终接近对照水平，通过径流损失的可能性很小。
Soil column method was used to study the characteristics of the movement, transformation, and leach of urea-N in soil added by different ways of the fertigation.
采用室内土柱模拟试验方法，研究了不同灌溉施肥方式下尿素态氮在土壤中的迁移、淋溶和转化特征。
Based on experiments, we analyzed and discussed the principles of Urea-N transformation and transport under drip-irrigation in the greenhouse.
在试验的基础上，分析讨论了温室滴灌条件下尿素氮运移分布和转化规律。
The urea-formaldehyde resin was made from industrial 36% formalin and 46% N carbamide in the laboratory. The urea-formaldehyde resin was used to imbed the insect specimens.
本文探讨了在实验室条件下利用工业用36 ％甲醛和含氮46％ 农用尿素合成脲醛树脂包埋昆虫标本的方法。
Besides, we discussed the effects of different fertilization period on the principles of Urea-N transformation and transport under drip-irrigation in this paper.
并初步讨论了滴灌条件下不同灌溉施肥时段对尿素转化运移规律的影响。
A field experiment was conducted to study the effects of 4 compound nitrogen fertilizer synergists on the growth and yield of maize and urea-N utilization by it.
在大田小区试验条件下，研究了复合氮肥增效剂对玉米生长、产量和尿素氮利用的影响。
BL-environmental friendly flame retardant belongs to N-P flame retardant series, and its main raw materials are phosphoric acid and urea the same as ammonium polyphosphate (APP).
BL -环保阻燃剂属于N - P系阻燃剂，其主要原料与聚磷酸铵一样是磷酸与尿素，但因为其特殊的合成工艺使它不同于普通的聚磷酸铵。
The direct blending of urea and coated PK granules prohibits the problems in the production of compound fertilizer based on urea-SSP, with lower N loss, easier sale and more economy.
采用尿素与包裹后的磷钾粒肥直接掺混，避免和解决了尿素-过磷酸钙系复混肥生产中存在的一系列问题，减少了氮素的损失，提高了产品的市场销售属性，增大了企业经济效益。
In the paper, the synthesis method of Urea-Formaldehycle (UF) Resin adhesive modified with phenol and N-butyl alcohol is discussed.
讨论了苯酚-正丁醇改性脲醛树脂胶粘剂的合成方法。实验表明，采用本方法制得的脲醛树脂胶粘剂各项性能优良。
The leaf surface tracer with 15N-urea showed that the urea nitrogen could be transfered into N-storage efficiently and rapidly.
N—尿素叶面示踪证明，尿素氮能迅速有效地传入氮库。
The leaf surface tracer with 15N-urea showed that the urea nitrogen could be transfered into N-storage efficiently and rapidly.
N—尿素叶面示踪证明，尿素氮能迅速有效地传入氮库。
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