| 甜瓜主茎叶不同叶位SPAD值空间分布与氮素营养诊断 |
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| 引用本文： | 胡国智,熊韬,张炎,冯炯鑫,吴海波,李青军.甜瓜主茎叶不同叶位SPAD值空间分布与氮素营养诊断[J].中国土壤与肥料,2017(1):80-85. |
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| 作者姓名： | 胡国智 熊韬 张炎 冯炯鑫 吴海波 李青军 |
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| 作者单位： | 1. 新疆农业科学院哈密瓜研究中心,新疆乌鲁木齐,830091;2. 新疆农业科学院土壤肥料与农业节水研究所,新疆乌鲁木齐,830091 |
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| 基金项目： | 国家自然科学基金(31460543)，现代农业产业技术体系建设专项(CARS-26-15) |
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| 摘 要： | 在设施栽培条件下,研究甜瓜关键生育期不同叶位SPAD值的变异特征及与叶片、植株氮素含量的相关性,探索提出基于SPAD仪诊断氮素营养最佳的测定叶位。结果表明,在各施氮水平下,不同叶位间叶片SPAD值存在一定差异,各叶位叶片SPAD值随施氮量的增加而增加。在适宜施氮(N 210 kg/hm~2)水平下,各生育期顶3叶和顶4叶SPAD值变异系数显著低于顶1叶和顶2叶,不同叶位叶片SPAD值与叶片、植株含氮量有较好的相关性,其中顶3叶与叶片、植株含氮量相关性最高。因此,用叶绿素SPAD仪诊断甜瓜氮素营养,顶3叶为较理想的指示叶或参照叶。
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| 关 键 词： | 甜瓜 SPAD值 叶位 营养诊断 |
| 收稿时间： | 2015/12/30 0:00:00 |
| 修稿时间： | 2016/2/29 0:00:00 |
Spatial distribution and nitrogen diagnosis of SPAD value for different leaves position on main stem of muskmelon |
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| HU Guo-zhi,XIONG Tao,ZHANG Yan,FENG Jiong-xin,WU Hai-bo,LI Qing-jun.Spatial distribution and nitrogen diagnosis of SPAD value for different leaves position on main stem of muskmelon[J].Soil and Fertilizer Sciences in China,2017(1):80-85. |
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| Authors: | HU Guo-zhi XIONG Tao ZHANG Yan FENG Jiong-xin WU Hai-bo LI Qing-jun |
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| Abstract: | Under the condition of protecting cultivation,the relevance among variability of SPAD values at different leaf positions and the nitrogen content of leaves in melon critical growth period was studied,the best leaf position of N diagnosis for muskmelon which based on SPAD meter was explored.The resuhs showed that in different nitrogen situation,leaf SPAD value at different leaf positions were different.Leaf SPAD value raised with increasing nitrogen fertilization in all leaf positions.Under the optimum level of nitrogen (N 210 kg/hm2),the variation coefficient of top 3rd leaf and top 4th leaf SPAD value were significantly lower than those of the top 1st and 2nd leaf in each growth stage.Leaf SPAD value of different leaf position had good correlation with N content of leaf and plant.The top 3rd leaf had the best correlation with leaf and plant nitrogen content.Consequently,when the nitrogen nutrition of muskmelon was diagnosed by SPAD chlorophyll meter,the ideal indicator leaf was top 3rd leaf. |
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| Keywords: | muskmelon SPAD values leaf position nitrogen diagnosis |
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