Prediction of Alkili-saline Information Based on NDVI of Rice Canopy

ZHANG Jun-hua; JIA Ke-li

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Prediction of Alkili-saline Information Based on NDVI of Rice Canopy

- Prediction of Alkili-saline Information Based on NDVI of Rice Canopy
- Bulletin of Soiland Water Conservation Vol. 30, Issue 6, Pages: 113-116(2011)
- 作者机构：
  
  1. 宁夏大学新技术应用研究开发中心,宁夏,银川,750021
  2. 宁夏大学资源环境学院,宁夏,银川,750021
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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ZHANG Jun-hua, JIA Ke-li. Prediction of Alkili-saline Information Based on NDVI of Rice Canopy[J]. Bulletin of Soiland Water Conservation, 2011, 30(6): 113-116.
DOI：

ZHANG Jun-hua, JIA Ke-li. Prediction of Alkili-saline Information Based on NDVI of Rice Canopy[J]. Bulletin of Soiland Water Conservation, 2011, 30(6): 113-116. DOI：

摘要

通过测定不同盐碱化程度土壤上覆植被光谱特征和土壤的盐碱化指标

探讨了通过上覆植被光谱与土壤盐碱化信息的关系。试验结果表明

水稻冠层归一化植被指数(NDVI)从返青期到孕穗期逐渐增大

孕穗期达到最大

然后开始下降;水稻全生育期冠层NDVI与土壤表层全盐、电导率(EC)呈显著相关(相关系数平均分别为0.608 2和0.623 9)

孕穗期相关性达到最强;除返青期外

其它时期水稻冠层NDVI与土壤Na

呈极显著相关关系(平均相关系数为0.564 8);全生育期水稻冠层NDVI与土壤HCO

和Mg>

的相关性很差或不稳定

所以从分蘖期到乳熟期

根据冠层NDVI可以较准确地估测土壤全盐、EC和Na

但不能准确估测土壤中的其它监基离子。

Abstract

Reflectance characteristics of canopy and salinity parameters of soil were studied to investigate the relationship of reflectance of above-vegetation and salinity information of soil.The results showed that the maximum of canopy NDVI value presented at booting of rice.Throughout the whole growth stages

the canopy NDVI increased with the decrease of the whole salt

EC of surface soil

especially at booting stage.The NDVI of rice canopy was inversely related to soil Na++K+ at jointing

booting and filling stages

except for the regreening stage.The NDVI of rice canopy did not presented significant differences with the increase of soil HCO3-

Cl-

SO24-

Ca2+ and Mg>2+ at the whole stages.Therefore

the total salt

EC and Na++K+ of alkali-saline soil could be accurately predicted through measuring the canopy reflectance of rice from tillering to filling stage.

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