肥包埋置测定包膜尿素在土壤中氮素释放的方法及应用  

Determination of nitrogen release from coated urea in soils using buried fertilizer packet and its application

作　　者：张昌爱[1,2] 于秀英 杨力[1,2] 林海涛[1,2] 辛淑荣 

机构地区：[1]山东省农业科学院农业资源与环境研究所,济南250100 [2]农业部废弃物基质化利用重点实验室,济南250100 [3]山东省济南市济阳县农业局,济阳251400

出　　处：《环境化学》2017年第9期2055-2061,共7页Environmental Chemistry

基　　金：山东省重点研发计划项目(2015GSF117005)资助~~

摘　　要：为了促进包膜控释肥在土壤中的养分释放测定方法的标准化,本文详述了肥包埋置法的实施细节和过程,并分析了树脂包膜尿素在小麦种植期内土壤中的氮素释放特征.试验结果发现,树脂包膜尿素在土壤中10、20、30、60、90、120、150、180、240 d时的氮素累计释放率分别为8.55%、16.30%、27.71%、34.65%、43.14%、51.86%、59.56%、63.60%、69.39%.控释期120 d,在静水中累计释放率83.6%的树脂包膜尿素,在小麦种植土壤中,240 d的时间内氮素的累计释放率仅有69.39%.表明包膜控释肥在静水中的释放情况与田间土壤条件下有着巨大差异.尽管树脂包膜肥料具有显著的控制释放作用,但如何使其在土壤条件下得到全量释放也是不容忽视的重要环节.In order to promote the standardization of the measurement method for nitrogen release from coated-urea in soils using buried fertilizer packet, the implement details and procedures were described in detail in this article, and a FPBM experiment was conducted to determine the nitrogen release from resin -coated-urea （RCU）in soils during wheat planting period. Results showed that the cumulative nitrogen release rate of RCU was 8.55 %, 16.30%, 27.71%, 34.65 %, 43.14%, 51.86%, 59.56% ,63.60% ,69.39% respectively after RCU was buried for 10 d ,20 d ,30 d ,60 d,90 d, 120 d, 150 d, 180 d and 240 d. The cumulative N release rate in the entire growth period （240 d） was only 69.39%, but the release rate for 120 d was 83.6% in water. That indicates the N release of RCU in water and soils was significantly different. Although RCU could restrict N release effectively, it is also important to promote N release of RCU in soils.

关 键 词：肥包法 肥包埋置法 氮素释放 树脂包膜尿素 

分 类 号：S145.6[农业科学—肥料学]