江苏滨海盐碱地“棉花—土壤”水盐变化的光谱监测研究
发布时间:2022-02-12 03:40
盐碱地是滨海地区限制土地生产力的重要限制因素,在作物生长和生产过程中受到水盐胁迫影响,严重影响着地区农业发展。棉花作为盐碱地的先锋作物,大力提高监测棉田作物水盐变化以及棉田土壤水盐变化对于棉花的产量和品质至关重要。本研究对棉花功能叶光谱和土壤表层光谱进行探究,确定棉花叶片光谱与叶片水盐含量的密切关系、土壤表层光谱与土壤水盐含量的密切关系,并以此为依据构建棉花功能叶高光谱水盐监测模型、棉田土壤水盐高光谱监测模型。本研究于2014-2015年基于江苏省滨海盐碱地地区,选择盐碱地具有盐分梯度代表性的生态试验点,共设置5个生态位点进行取样。分别获取棉花四个生长期的棉花功能叶光谱、棉田土壤室内表层光谱,研究优化了棉花功能叶高光谱参数的水盐监测精确模型;滨海盐土土壤水分与高光谱之间的关系并建立监测模型;滨海盐土土壤电导率与高光谱之间的关系并建立监测模型。主要研究结果如下:1滨海盐碱地基于棉花功能叶高光谱参数的水盐监测模型研究试验于2014-2015年在江苏省滨海盐碱地选择具有盐分梯度代表性的5个生态试验点,研究了棉花功能叶光谱反射率与叶片水盐含量的关系,基于已有叶片水盐光谱监测模型进行参数修正,构...
【文章来源】:南京农业大学江苏省211工程院校教育部直属院校
【文章页数】:79 页
【学位级别】:硕士
【部分图文】:
不同相对含水量、等效水厚度的棉株功能叶光谱反射率曲线
2.2棉花功能叶含水量的监测模型??2.2.1盐碱地棉花功能叶含水量监测模型的参数修正??表2-2盐分影响下光谱指数与棉花功能叶含水量的已有定量关系(20l4,n=l00)??Table?2-2?the?quantitative?relationship?between?the?spectral?index?and?(he?cotton?leaf?water?content???of?cotton?under?the?influence?of?salinity???叶片含水f:?植被指数?回归方程?决定系数?标准误??Leaf?water?content?vegetation?index?regression?equation?R:?SE??y?=?-0.7137x+?1.0143?0.66?0.0026??RSI|(R22m,Ri32i)?y=1.0572e-l,92K?x?0.65?0.0027??叶厂丨利丨对IV水:丨丨丨?y=0.5568x?o?,K,2?0.63?0.0028??RWC?y?=?0.6292x?+?0.4506?0.64?0.0026??NDSI,(R,222,?R22M)?y?=?0.5079e,,XIKK?0.64?0.0027??y=?1.0295x°4277?0.65?0.0028??y=0.0589x+7E-05?0.63?0.00023??RSI:(R:3〇7,Riu7)?y=0.0065e'297v?0.64?0.00023??等效水丨,y=0.0572xui;74v?0.63?0.00024??EWT?y?=?-0.049
2.2棉花功能叶含水量的监测模型??2.2.1盐碱地棉花功能叶含水量监测模型的参数修正??表2-2盐分影响下光谱指数与棉花功能叶含水量的已有定量关系(20l4,n=l00)??Table?2-2?the?quantitative?relationship?between?the?spectral?index?and?(he?cotton?leaf?water?content???of?cotton?under?the?influence?of?salinity???叶片含水f:?植被指数?回归方程?决定系数?标准误??Leaf?water?content?vegetation?index?regression?equation?R:?SE??y?=?-0.7137x+?1.0143?0.66?0.0026??RSI|(R22m,Ri32i)?y=1.0572e-l,92K?x?0.65?0.0027??叶厂丨利丨对IV水:丨丨丨?y=0.5568x?o?,K,2?0.63?0.0028??RWC?y?=?0.6292x?+?0.4506?0.64?0.0026??NDSI,(R,222,?R22M)?y?=?0.5079e,,XIKK?0.64?0.0027??y=?1.0295x°4277?0.65?0.0028??y=0.0589x+7E-05?0.63?0.00023??RSI:(R:3〇7,Riu7)?y=0.0065e'297v?0.64?0.00023??等效水丨,y=0.0572xui;74v?0.63?0.00024??EWT?y?=?-0.049
本文编号:3621194
【文章来源】:南京农业大学江苏省211工程院校教育部直属院校
【文章页数】:79 页
【学位级别】:硕士
【部分图文】:
不同相对含水量、等效水厚度的棉株功能叶光谱反射率曲线
2.2棉花功能叶含水量的监测模型??2.2.1盐碱地棉花功能叶含水量监测模型的参数修正??表2-2盐分影响下光谱指数与棉花功能叶含水量的已有定量关系(20l4,n=l00)??Table?2-2?the?quantitative?relationship?between?the?spectral?index?and?(he?cotton?leaf?water?content???of?cotton?under?the?influence?of?salinity???叶片含水f:?植被指数?回归方程?决定系数?标准误??Leaf?water?content?vegetation?index?regression?equation?R:?SE??y?=?-0.7137x+?1.0143?0.66?0.0026??RSI|(R22m,Ri32i)?y=1.0572e-l,92K?x?0.65?0.0027??叶厂丨利丨对IV水:丨丨丨?y=0.5568x?o?,K,2?0.63?0.0028??RWC?y?=?0.6292x?+?0.4506?0.64?0.0026??NDSI,(R,222,?R22M)?y?=?0.5079e,,XIKK?0.64?0.0027??y=?1.0295x°4277?0.65?0.0028??y=0.0589x+7E-05?0.63?0.00023??RSI:(R:3〇7,Riu7)?y=0.0065e'297v?0.64?0.00023??等效水丨,y=0.0572xui;74v?0.63?0.00024??EWT?y?=?-0.049
2.2棉花功能叶含水量的监测模型??2.2.1盐碱地棉花功能叶含水量监测模型的参数修正??表2-2盐分影响下光谱指数与棉花功能叶含水量的已有定量关系(20l4,n=l00)??Table?2-2?the?quantitative?relationship?between?the?spectral?index?and?(he?cotton?leaf?water?content???of?cotton?under?the?influence?of?salinity???叶片含水f:?植被指数?回归方程?决定系数?标准误??Leaf?water?content?vegetation?index?regression?equation?R:?SE??y?=?-0.7137x+?1.0143?0.66?0.0026??RSI|(R22m,Ri32i)?y=1.0572e-l,92K?x?0.65?0.0027??叶厂丨利丨对IV水:丨丨丨?y=0.5568x?o?,K,2?0.63?0.0028??RWC?y?=?0.6292x?+?0.4506?0.64?0.0026??NDSI,(R,222,?R22M)?y?=?0.5079e,,XIKK?0.64?0.0027??y=?1.0295x°4277?0.65?0.0028??y=0.0589x+7E-05?0.63?0.00023??RSI:(R:3〇7,Riu7)?y=0.0065e'297v?0.64?0.00023??等效水丨,y=0.0572xui;74v?0.63?0.00024??EWT?y?=?-0.049
本文编号:3621194
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