| 叶绿素仪在氮肥推荐中的应用研究进展 |
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| 引用本文： | 李志宏,刘宏斌,张云贵.叶绿素仪在氮肥推荐中的应用研究进展[J].植物营养与肥料学报,2006,12(1):125-132. |
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| 作者姓名： | 李志宏 刘宏斌 张云贵 |
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| 作者单位： | 1.中国农业科学院土壤肥料研究所农业部植物营养重点实验室 北京100081 |
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| 摘 要： | 叶绿素仪(Chlorophyll.meter)是近年来欧美一些国家在推荐施氮中开始使用的一种新型便携式仪器。这种仪器以叶绿素对红光和近红外光的不同吸收特性为原理来测定植物叶片的相对叶绿素含量,通过叶绿素与叶片全氮的关系来反映作物的氮营养状况,进而确定作物是否缺氮。这种新型仪器的使用为简便、快速、准确地进行氮肥推荐提供了一种新的思路。因此,通过研究不同作物,不同种植条件下叶绿素仪测定值与作物叶片全氮、作物产量之间的相关性,确定叶绿素仪测定值的临界水平,以及不同作物的测定部位、样品采集数量及影响测定准确性的因素,使这种技术尽快地应用于田间生产,有助于推动我国推荐施氮技术的进步。
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| 关 键 词： | 叶绿素仪 氮肥 推荐施肥 |
| 文章编号： | 1008-505X(2006)01-0125-08 |
| 收稿时间： | 2004-11-23 |
| 修稿时间： | 2004年11月23 |
A review on chlorophyll meter application on nitrogen fertilizer recommendation |
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| LI Zhi-Hong,LIU Hong-bin,Zhang Yun-gui.A review on chlorophyll meter application on nitrogen fertilizer recommendation[J].Plant Nutrition and Fertilizer Science,2006,12(1):125-132. |
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| Authors: | LI Zhi-Hong LIU Hong-bin Zhang Yun-gui |
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| Institution: | 1.Soil and Fertilizer Inst.;CAAS;Key Lab.of Plant Nutrition;MOA;Beijing 100081;China |
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| Abstract: | Minolta chlorophyll meter(SPAD-502) was a compact portable lightweight meter that was used in the nitrogen fertilizer recommendation in recent years in developed countries.The principle of the meter underlay was the different absorbance characteristics chlorophyll on the red region and infrared region.Then the content of chlorophyll in plant leaf could be detected by the amount of light transmitted by leaf in the two wavelength regions.This instrument could be a very useful tool for plant N status diagnosis in crop production due to its convenient,rapid and precise reading.In order to make use of chlorophyll meter in crop N recommendation,it is necessary to make clear the relationship of the SPAD reading with leaf N content and crop yield of different crops under field management measures to elucidate the diagnosing position and leaf sampling and set up the critical values for N recommendation in practice.The physiology basis used by SPAD-502 chlorophyll meter to determine the crop nitrogen status was introduced in this paper.The relationship of SPAD readings and nitrogen content for different crops,critical chlorophyll value at different growth stage,leaf position for testing and necessary numbers for sampling were also reviewed.Some factors such as crop,environmental condition and crop management measures which influencing the readings of chlorophyll meter was discussed in this paper. |
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| Keywords: | chlorophyll meter nitrogen fertilizer recommendation |
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