排灌机械工程学报Issue(6)：547-552,6.DOI:10.3969/j.issn.1674-8530.14.0043
水、氮和保水剂对小粒咖啡水氮利用的影响
Effects of soil moisture,nitrogen and superabsorbent polymers on water and nitrogen use of arabica coffee
摘要
Abstract
To explore the optimal mode of water and nitrogen management and effective utilization of young arabica coffee tree,using two water levels,i.e.middle water WM,65%~80%of soil field ca-pacity (FC)and low water (WL,50%~65%FC),three nitrogen levels,i.e.high nitrogen (NH, 0.4 g/kg air-dried soil),low nitrogen (NL,0.20 g/kg air-dried soil)and no nitrogen (NZ,0),two SAP levels,i.e.added SAP (SH,1 kg/m3)and no SAP (SZ,0),the effects of soil moisture,nitro-gen and superabsorbent polymers (SAP)on accumulation of water and nitrogen,dry mass production and use of water as well as nitrogen in root-zone of young arabica coffee tree were studied.The results show that,compared to WL ,WM can increase total dry mass,water use efficiency (WUE),total nitro-gen uptake (TNU)and nitrogen dry matter production efficiency (NDMPE)by 86.0%,36.4%, 73.1% and 5 .3%,respectively.Compared to NZ ,NL and NH has the same effect on WUE and TNU increment.Compared to SZ ,SH can increase soil NO3--N content,total dry mass,WUE and TNU by 21.9% ~43.0%,78.3%,68.9% and 91.2%,respectively,while NDMPE is redued by 10.0%.Under the condition of middle water (65% ~80%FC)and low nitrogen (0.2 g/kg dry soil),SAPcan effectively regulate soil moisture and nitrogen environment,and can promote dry mass productionand increase water and nitrogen use efficiency.Therefore,WMNLSH is the optimum combination of wa-ter and nitrogen efficient use in the experiment.关键词
小粒咖啡/水分/氮素/保水剂/干物质生产/水氮利用Key words
arabica coffee/water/nitrogen/superabsorbent polymers/dry mass production/water and nitrogen use分类
农业科技引用本文复制引用
刘小刚,殷欣,符娜,杨启良,杨新荣..水、氮和保水剂对小粒咖啡水氮利用的影响[J].排灌机械工程学报,2014,(6):547-552,6.基金项目
国家自然科学基金资助项目（51109102，51379004）；云南省应用基础研究资助项目（2010ZC043，2013FB024，KKSY201223076）；云南省教育厅科学研究基金资助重点项目 （）
