干旱地区农业研究2017，Vol.35Issue(1)：103-107,5.DOI:10.7606/j.issn.1000-7601.2017.01.16
基于叶片SPAD值的滴灌春小麦氮肥分期施用推荐模型
Recommendation model of nitrogen fertilizer based on SPAD of leaves for drip-irrigated spring wheat
摘要
Abstract
To explore a nitrogen fertilizer recommendation using SPAD-502 for drip-irrigated spring wheat,an ex-periment had been carried out between 2014 and 2015 .Field test data in 2014 was applied to establish a nitrogen fertiliz-er recommendation model based on SPAD of leaves for drip-irrigated spring wheat,which was compared with the field test in 2015 .The results showed that the SPAD of wheat leaves presented a liner increasing trend with the increase of N fer-tilizer rate at jointing,booting,heating and filling stages .The corresponding thresholds of SPAD were 42 .4,39 .4, 41 .8,and 54.1,respectively,when the total application rate of nitrogen fertilizer was 261 kg·hm-2 during the whole growth period of spring wheat .As a result,a nitrogen fertilizer recommendation model based on the SPAD of leaves could be established in this experiment .Field experiment indicated that the nitrogen fertilizer recommendation model could make the fertilizer application rate down by 7 .86%and the utilization ratio up by 9 .64%when wheat yield is secured .关键词
春小麦/滴灌/SPAD值/氮肥推荐模型Key words
spring wheat/drip irrigation/SPAD value/N fertilizer recommendation分类
农业科技引用本文复制引用
史力超,翟勇,王雪艳,侯振安,冶军..基于叶片SPAD值的滴灌春小麦氮肥分期施用推荐模型[J].干旱地区农业研究,2017,35(1):103-107,5.基金项目
国家科技支撑计划课题 （）
