基于RapidSCAN CS-45的新疆滴灌冬小麦氮肥推荐研究  

Study on Nitrogen Fertilizer Recommendation Based on RapidSCAN CS-45 for Drip-Irrigated Winter Wheat in Xinjiang

作　　者：赖宁[1,2] 耿庆龙[1,2] 李青军[1] 赵海燕 陈署晃[1,2] LAI Ning;GENG Qinglong;LI Qingjun;ZHAO Haiyan;CHEN Shuhuang(Institute of Soil,Fertilizer and Water Saving Agriculture,Xinjiang Academy of Agricultural Sciences,Urumqi,Xinjiang 830091,China;Agricultural Remote Sensing Center,Xinjiang Academy of Agricultural Sciences,Urumqi,Xinjiang 830091,China;Xinjiang Jiushenghe Academy of Seed Standard Co.Ltd.Changji,Xinjiang 831113,China)

机构地区：[1]新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐830091 [2]新疆农业科学院农业遥感中心,乌鲁木齐830091 [3]新疆九圣禾种子标准研究院有限公司,新疆昌吉831113

出　　处：《麦类作物学报》2021年第1期96-104,共9页Journal of Triticeae Crops

基　　金：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)。

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),分析其与滴灌冬小麦各生育时期氮肥施用效应的关系,建立了新疆滴灌冬小麦生育时期施氮模型。结果表明,滴灌冬小麦冠层NDVI和NDRE值在返青期至孕穗期均快速增加,在孕穗期至灌浆期增长减缓,进入灌浆期后开始降低;滴灌冬小麦冠层NDVI与NDRE值的动态变化趋势具有明显的一致性,总体上随施氮量的增加而增大,均与施氮量呈显著的线性关系,其中在返青期和扬花期NDVI与施氮量的线性关系最好,r分别为0.9254和0.9445,在拔节期、孕穗期、灌浆期和乳熟期NDRE与施氮量的线性关系最好,r分别为0.9297、0.9596、0.941和0.953;滴灌冬小麦全生育时期总施氮量为239.98 kg·hm^(-2),返青期、拔节期、孕穗期、扬花期、灌浆期和乳熟期冠层NDVI临界值分别为0.1508、0.7213、0.8206、0.8288、0.8316和0.7410,NDRE临界值分别为0.0593、0.2425、0.3076、0.3465、0.3604和0.3225。因此,在滴灌冬小麦返青期和扬花期,可选择基于冠层NDVI建立的施氮推荐模型,拔节期、孕穗期和灌浆期选择基于冠层NDRE建立的施氮模型实现推荐施氮。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 0.9254 and 0.9445,respectively.NDRE is better than NDVI during the growth stages of jointing,booting,filling and milking,and the r were 0.9297,0.9596,0.9410 and 0.9530,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 0.1508,0.7213,0.8206,0.8288,0.8316 and 0.7410,respectively.The corresponding thresholds of

关 键 词：滴灌冬小麦 氮肥施氮推荐 NDVI NDRE 

分 类 号：S512.1[农业科学—作物学] S311