桐油包膜尿素在无土基质中的利用性研究  

Study of utilization rate of coated urea nutrient release based on non soil culture

作　　者：王波[1] 施卫省[1] 王亚明[2] 

机构地区：[1]昆明理工大学现代农业工程学院,云南昆明650224 [2]昆明理工大学生物与化学工程学院,云南昆明650224

出　　处：《农业系统科学与综合研究》2006年第3期182-184,188,共4页System Sciemces and Comprehensive Studies In Agriculture

基　　金：国家自然科学基金项目(20264002)

摘　　要：以自然资源桐油为包膜材料(从油桐果实中提取),生产包膜肥料,研究桐油包膜尿素在无土基质中的养分利用性。结果表明:在无土基质环境条件下,用无土栽培的方法测定桐油包膜尿素的养分释放性,在第1天的初期溶出率为22.5%,而普通尿素为82.1%,低于普通尿素59.6%;桐油包膜尿素的烟草生物量干重每盆为42.4g,普通尿素的烟草生物量干重每盆为14.4g;桐油包膜尿素氮素利用率为48.5%,而普通尿素的氮素利用率为15.7%。对无土基质生产而言,易发生肥料的氮素挥发损失,故在配方施肥中,应考虑增加氮素的施入量。表6,参5。This text studies coating material as the tung oil of the nature resources （withdraw from the fruit of tree） and producing the coatedreleased-fertilizer and Study of the ratio of utilization of release of nutrient with the coating urea based on Soil-less culture. The result shows that the early rate of nutrient released from coated-released-urea is 22.5% in the way of the soil-less culture condition and the early rate of nutrient released from urea is 82.1% and is lower 59.6% ; it may be produced 42.4g bio-mass in coated-released-urea and may be produced 14.4g bio-mass in urea and is tall 28.0g bio-mass in coated-release＆ urea; The ratio of utilization of nitrogen from coated-released-urea is 48.5% and The ratio of utilization of nitrogen from urea is 15.7% and is not lower 33.2% . Conclusion： by means of the soil-less culture , The proof is tested that the rate and utilization of nutrient released from coated-released- urea as coating material with tung oil, The loss of nitrogen easily happen and in project of fill a prescription we ought to add nitrogen fertilizer.

关 键 词：桐油包膜尿素 无土基质 氮素利用率 缓释肥料 氮肥 

分 类 号：S145.6[农业科学—肥料学]