| 基于叶片SPAD的棉花氮营养指数估算研究 |
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| 引用本文： | 哈发都曼,马露露,印彩霞,苏维,李冬梅,丁怡人,吕新,张泽. 基于叶片SPAD的棉花氮营养指数估算研究[J]. 中国农学通报, 2021, 37(18): 31-37. DOI: 10.11924/j.issn.1000-6850.casb2020-0499 |
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| 作者姓名： | 哈发都曼 马露露 印彩霞 苏维 李冬梅 丁怡人 吕新 张泽 |
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| 作者单位： | 1.石河子大学农学院,新疆石河子 832003;2.新疆生产建设兵团绿洲生态农业重点实验室,新疆石河子 832003 |
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| 基金项目： | 兵团重点领域科技攻关计划项目“棉花营养监测与智能诊断关键技术产品及云平台研发应用重点领域”(2020AB005);石河子大学创新发展专项“基于‘图谱’融合的滴灌棉花氮素营养快速诊断技术研发及应用”(CXFZ201903) |
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| 摘 要： | 为了探究不同施氮处理对棉花叶片SPAD值、生物量和氮营养指数(NNI)的影响,通过两年田间试验,设置5个施氮水平(即0、120、240、360、480 kg/hm2),开展棉花叶片SPAD值、氮素吸收分配规律和生物量变化的研究.研究结果发现:棉叶SPAD值随施氮量增加呈增加趋势,在N4处理下获得最大值;建立棉花氮浓度稀...
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| 关 键 词： | SPAD值 氮营养指数 稀释模型 生物量 |
| 收稿时间： | 2020-09-25 |
Nitrogen Nutrition Index of Cotton: Estimation Based on Leaf SPAD |
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| Ha Faduman,Ma Lulu,Yin Caixia,Su Wei,Li Dongmei,Ding Yiren,Lv Xin,Zhang Ze. Nitrogen Nutrition Index of Cotton: Estimation Based on Leaf SPAD[J]. Chinese Agricultural Science Bulletin, 2021, 37(18): 31-37. DOI: 10.11924/j.issn.1000-6850.casb2020-0499 |
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| Authors: | Ha Faduman Ma Lulu Yin Caixia Su Wei Li Dongmei Ding Yiren Lv Xin Zhang Ze |
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| Affiliation: | 1.College of Agriculture, Shihezi University, Shihezi Xinjiang 832003;2.The Key Laboratory of Oasis Ecology Agriculture, Xinjiang Production and Construction Group, Shihezi Xinjiang 832003 |
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| Abstract: | To explore the effects of different nitrogen application treatments on the SPAD value, biomass and nitrogen nutrition index (NNI) of cotton leaves, through a 2-year field experiment, 5 nitrogen application levels (0, 120, 240, 360, 480 kg/hm2) were set to study the SPAD value of cotton leaves, the law of nitrogen absorption and distribution, and the change of biomass. The results showed that the SPAD value of cotton leaves increased with the increase of nitrogen application rate, and reached the maximum value under N4 treatment. The dilution model of cotton nitrogen concentration was established: Nc=3.02Wmax-0.24. The analysis showed that there was a positive correlation between SPAD and NNI of cotton leaves, and the correlation coefficient R2 was 0.05-0.74. It is proved that the simulation performance of the model at different growth stages of cotton is relatively good, and the correlation coefficient could reach the maximum at 97 days after seedling emergence. There is a significant positive correlation between the SPAD value of cotton leaves and the critical nitrogen concentration, which can be used as an index for cotton nitrogen nutrition diagnosis. |
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| Keywords: | SPAD value nitrogen nutrition index dilution model biomass |
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