| 基于RapidSCAN CS-45的新疆滴灌冬小麦氮肥推荐研究 |
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| 引用本文： | 赖 宁,耿庆龙,李青军,赵海燕,陈署晃.基于RapidSCAN CS-45的新疆滴灌冬小麦氮肥推荐研究[J].麦类作物学报,2021,41(1):96-104. |
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| 作者姓名： | 赖 宁 耿庆龙 李青军 赵海燕 陈署晃 |
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| 作者单位： | 新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐830091;新疆农业科学院农业遥感中心,乌鲁木齐830091;新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐830091;新疆九圣禾种子标准研究院有限公司,新疆昌吉831113 |
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| 基金项目： | 国家重点研发计划项目（2018YFD0200406）；新疆维吾尔自治区公益性科研院所基本科研业务费专项（KY2017063，KY2018028）；新疆农业科学院重点项目前期预研专项（xjzdy-002） |
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| 摘 要： | 为给滴灌小麦氮营养状况实时评估和氮肥合理施用提供参考,通过2年田间定位试验,以当地主栽品种新冬22号为试验材料,设置5个施氮水平(0、120、240、360、480 kg· hm-2),利用主动式光谱仪RapidScan CS-45获取各生育时期冠层归一化植被指数(NDVI)和归一化红边植被指数(NDRE),分析其与滴...
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| 关 键 词： | 滴灌冬小麦 氮肥施氮推荐 NDVI NDRE |
Study on Nitrogen Fertilizer Recommendation Based on RapidSCAN CS-45 for Drip-Irrigated Winter Wheat in Xinjiang |
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| LAI Ning,GENG Qinglong,LI Qingjun,ZHAO Haiyan,CHEN Shuhuang.Study on Nitrogen Fertilizer Recommendation Based on RapidSCAN CS-45 for Drip-Irrigated Winter Wheat in Xinjiang[J].Journal of Triticeae Crops,2021,41(1):96-104. |
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| Authors: | LAI Ning GENG Qinglong LI Qingjun ZHAO Haiyan CHEN Shuhuang |
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| Abstract: | The objective of this study was to provide a theoretical basis for real-time evaluating nitrogen nutrition and rational nitrogen fertilization of drip-irrigated winter wheat in Xinjiang Province, through a two year fixed position experiment by using the local popular variety Xindong 22 as material under five nitrogen application levels (0, 120, 240, 360 and 480 kg·hm-2).The models of nitrogen fertilizer recommendation of drip-irrigated winter wheat growing stages were constructed based on the analysis of the relationship between the application of nitrogen fertilizer and remote sensing indicators:NDVI and NDRE at different growth stages, which were measured using the portable active remote sensing spectrometer RapidScan CS-45 on canopy. The results showed that the values of NDVI and NDRE in drip-irrigated winter wheat canopy increased rapidly during the recovering stage and the booting stage, and during the booting stage and the filling stage.The values of NDVI and NDRE increased slowly, and they began to decrease after filling stage; the dynamic change trend of NDVI and NDRE in drip-irrigated winter wheat canopy is significantly consistent.In general, the values of NDVI and NDRE increased with the increase of nitrogen fertilizer application amount, and it presentsed a significant liner relationship between the value of spectral indices (NDVI and NDRE) and nitrogen fertilizer application at growing stages,NDVI was better than NDRE during the growth stages of recovering and flowering, and the r were 0.925 4 and 0.944 5, respectively. NDRE is better than NDVI during the growth stages of jointing, booting, filling and milking, and the r were 0.929 7, 0.959 6, 0.941 0 and 0.953 0, respectively. The total application rate of nitrogen fertilizer was 239.98 kg·hm-2 during the whole growth period of drip-irrigated winter wheat. The corresponding thresholds of NDVI at the growth stages of recovering, jointing, booting, flowering, grain filling and milking were 0.150 8, 0.721 3, 0.820 6, 0.828 8, 0.831 6 and 0.741 0, respectively. The corresponding thresholds of NDRE at the above six growth stages were 0.059 3, 0.242 5, 0.307 6, 0.346 5, 0.360 4 and 0.322 5, respectively. As a result, the recommended nitrogen application model based on canopy NDVI could be selected at the growth stages of recovering and flowering, and the recommended nitrogen application model based on canopy NDVI could be selected at the growth stages of jointing, booting and grain filling. |
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| Keywords: | Drip-irrigated winter wheat Nitrogen fertilizer recommendation of topdressing NDVI NDRE |
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