新疆农业科学2024，Vol.61Issue(10)：2366-2373,8.DOI:10.6048/j.issn.1001-4330.2024.10.004
基于SPAD值的滴灌冬小麦氮肥推荐模型分析
Study on recommended nitrogen fertilizer quota for winter wheat under drip irrigation based on SPAD value
摘要
Abstract
[Objective]To provide a reference for the real-time monitoring of nitrogen nutrition and the scientific and rational application of nitrogen fertilizer during the key growth period of winter wheat under drip irrigation.[Methods]The leaf SPAD values of winter wheat under drip irrigation with different nitrogen gradi-ents were obtained by using chlorophyll analyzer SPAD-502,the relationship among leaf SPAD value,nitro-gen application amount and yield was analyzed,and the recommended nitrogen fertilizer model of winter wheat at each key growth stage based on SPAD value was established.[Results]Leaf SPAD value of drip irrigation winter wheat decreased slowly from jointing stage to booting stage,increased rapidly from booting stage to fill-ing stage,and began to decrease after entering filling stage.The SPAD values of different nitrogen treatments were significantly different at different growth stages excluding milk maturity stage.There was a significant lin-ear correlation between leaf SPAD and nitrogen application at jointing stage,booting stage,flowering stage and filling stage,and the correlation coefficient was above 0.826;The relationship between yield and nitrogen ap-plication was quadratic function,Y=-0.034,5X2+19.494X+6,035;The highest yield was 8,789 kg/hm2,and the corresponding nitrogen application was 282.52 kg/hm2,In order to obtain the optimal economic yield of 8,782.12 kg/hm2,the nitrogen application amount was 268.67 kg/hm2;The critical SPAD values at joint-ing,booting,flowering and filling stages were 43.07、42.09、49.35 and 52.07,respectively.[Conclusion]A ideal nitrogen recommendation model was established according to the relationship between SPAD value and nitrogen application amount in each growth period.The recommended nitrogen fertilizer model based on SPAD value of wheat leaves can realize nutrient diagnosis and guide phased fertilization.关键词
滴灌冬小麦/SPAD值/施氮量/氮肥推荐模型Key words
drip-irrigated winter wheat/SPAD value/nitrogen application rate/nitrogen fertilizer rec-ommendation of topdressing分类
农业科技引用本文复制引用
孙法福,赖宁,耿庆龙,李永福,吕彩霞,信会男,李娜,陈署晃..基于SPAD值的滴灌冬小麦氮肥推荐模型分析[J].新疆农业科学,2024,61(10):2366-2373,8.基金项目
农业科技创新稳定支持专项(xjnkywdzc-2022002) （xjnkywdzc-2022002）
新疆维吾尔自治区重大科技专项项目(2022A02011-2) （2022A02011-2）
新疆农业科学院自主培育专项(xjnkycxzx-2022004) Agricultural Science and Technology Innovation and Stability Support Project(xjnkywdzc-2022002) （xjnkycxzx-2022004）
Major Science and Technolo-gy Special Project of Xinjiang Uygur Autonomous Region(2022A02011-2) （2022A02011-2）
Independent Cultivation Project of Xinjiang Academy of Agricultural Sciences(xjnkycxzx-2022004) （xjnkycxzx-2022004）
