摘要
为评价减少氮肥施用量对不同玫瑰品种产量、经济效益及环境的影响,以滇池周边主要农业生产区晋宁县3个玫瑰主栽品种为试验对象,在大棚条件下,研究减量施用氮肥对其产量、经济效益、土壤和地下水氮含量的变化规律。结果表明,按花农习惯施氮量(N 374.9kg/hm2,P2O5225.1kg/hm2,K2O225.2kg/hm2)基础上减氮25%,超级、艳粉及黑玫品种的产量较农民习惯施肥处理分别增产35.50%、2.50%及1.72%,经济效益分别提高36.72%、3.11%及2.73%;减氮50%时,超级、艳粉分别较农民习惯施氮量处理增产0.42%及18.40%,超级、艳粉经济效益分别提高1.45%及19.81%。结论:适量减少氮肥施用量可增加玫瑰产量,提高经济效益,但与品种有关,具体表现为超级以减氮25%、艳粉以减氮50%较适宜,黑玫减量施氮对增产及经济效益均无实际意义;减量施用氮肥可降低植花土壤中全氮的积累,减少表层土壤水解氮的径流及中、下层中土壤中水解氮的渗透,并能降低地下水的含氮量。
The effects of reducing nitrogen application on economic benefit,and environment benefit of three main rose varieties were analyzed in a greenhouse to study the change regulation of yield,economic benefit,soil and nitrogen content in underground water in Jinyuan County,Yunnan.The results showed that the yield and economic benefit of Chaoji,Yanfen and Heimei varieties under 75% convention nitrogen application amount could increase by 35.50%,2.50 and 1.72% ,and 36.72%,3.11% and 2.73%respectively.The yield and economic benefit of Chaoji,and Yanfen varieties under 50% convention nitrogen application amount could increase by 0.42% and 18.40%,and 1.45% and 19.81% separately.In conclusion,suitable reducing nitrogen application amount raise yield and economic benefit and reduce nitrogen accumulation in soil, hydrolysable nitrogen run-off on the topsoil, hydrolysable nitrogen permeation in middle and bottom soil layers and nitrogen content in underground water.
出处
《贵州农业科学》
CAS
北大核心
2014年第2期73-76,共4页
Guizhou Agricultural Sciences
基金
国家重大科技水专项滇池项目第三课题"滇池流域农田面源污染综合控制与水源涵养林保护关键技术及工程示范"(2012ZX07102-003)
关键词
氮肥减量
玫瑰
经济效益
环境效益
reducing nitrogen application
rose
economic benefit
environment benefit
