【作者】 吴春霞； 任岗； 赵俊荣； 白丽； 白书军；

【Author】 WU Chun-xia1 Ren Gang1 ZHAO Jun-rong1 BAI Li2 BAI Shu-jun1 (1 Wulanwusu Agrometeorological Experiment Station; 2 College of Biology,Shihezi University: Xinjiang 832003, China,)

【机构】 乌兰乌苏农业气象试验站； 石河子大学生命科学学院；

【摘要】 【研究目的】揭示棉花冠层高光谱特征,为建立棉花高光谱估算模型,促进高光谱技术在棉花长势监测和估产中应用提供依据。【方法】结合棉花生长发育规律,对棉花各时期冠层进行高光谱反射率测定,基于棉花盛蕾期至吐絮后期7次采样的地面光谱数据,研究不同棉花品种、灌水量及氮素营养对棉花冠层光谱反射特性的影响。【结果】在可见光区,适度缺氮(N1)条件下的冠层光谱反射率相对较高,而氮过量(N3)条件下的冠层光谱反射率相对较低;随着灌水量的增加,在近红外波段,其冠层光谱反射率呈上升趋势,在盛蕾期和盛花期不同灌水量处理的光谱反射率差异较明显;不同棉花品种冠层光谱反射率存在一定差异,在近红外波段新陆早13与新陆早10只在吐絮后期光谱反射率差异不明显,在前三个生育期差异较明显。更多还原

【Abstract】 The effects of different cotton varieties, irrigation levels and nitrogen levels on characteristics of reflection spectrum of cotton canopy were studied. The results of the studying showed that there was a marked difference in the reflection spectrum of the canopy at different growth stages of cotton.The reflection spectrum of the canopy increased before flower and boll stage and decreased after flower,and boll stage with the growth of cotton. The reflection spectrum of the canopy decreased in the near infrared wave lands and increased in the visible wave lands with increasing the irrigation level.There were some difference in the reflection spectrum of the canopy for different cotton varieties. The reflection spectrum of the canopy for the treatments of N0 and N3 had a marked difference in the near infrared wave lands.更多还原