基于头季关键生育期的NDVI值诊断再生稻的生长状况

明确再生稻头季光谱数据与再生季生长的相关性，是一种预测和诊断再生稻生长状况的便捷方法。研究采取主动式的Greenseeker 光谱仪，测定了不同再生稻品种（组合）关键生育期的NDVI，结合再生稻的生理指标分析计算了头季抽穗前后的NDVI和再生季抽穗后的干物质、LAI和叶片氮含量（累积）的相关性。结果表明头季抽穗后的NDVI与再生季抽穗后的绿叶生物量、LAI、营养器官和绿叶的氮累积具有显著的指数正相关，且不受再生稻品种（组合）类型的影响。利用不同密度试验的数据对方程进行了较充分的验证和检测，表明模拟值与实测值之间符合度较高，估算精度为0．9765，估计的RMSE为1．464，平均相对误差为－0．...

Full description

Saved in:
Bibliographic Details
Published in江西农业学报 Vol. 27; no. 2; pp. 7 - 11
Main Author 柳开楼 刘璇 胡惠文 段红霞 夏桂龙 李亚贞
Format Journal Article
LanguageChinese
Published 江西省红壤研究所/国家红壤改良工程技术研究中心/农业部江西耕地保育科学观测实验站,江西 南昌,330046%江西省余江县农业局,江西 余江,335200%江西省邓家埠水稻原种场,江西 余江,335200 2015
Subjects
光谱分析
再生稻
冠层NDVI
相关性
冠层NDVI
Correlation
相关性
Canopy NDVI
Spectrum analysis
再生稻
光谱分析
Regenerated rice
Online AccessGet full text
ISSN1001-8581

Cover

More Information
Summary:明确再生稻头季光谱数据与再生季生长的相关性，是一种预测和诊断再生稻生长状况的便捷方法。研究采取主动式的Greenseeker 光谱仪，测定了不同再生稻品种（组合）关键生育期的NDVI，结合再生稻的生理指标分析计算了头季抽穗前后的NDVI和再生季抽穗后的干物质、LAI和叶片氮含量（累积）的相关性。结果表明头季抽穗后的NDVI与再生季抽穗后的绿叶生物量、LAI、营养器官和绿叶的氮累积具有显著的指数正相关，且不受再生稻品种（组合）类型的影响。利用不同密度试验的数据对方程进行了较充分的验证和检测，表明模拟值与实测值之间符合度较高，估算精度为0．9765，估计的RMSE为1．464，平均相对误差为－0．1191，RRMSE为0．1814。
Bibliography:36-1124/S
To make clear the relationship between the growth of regenerated rice and the canopy NDVI value of main rice is a convenient method for forecasting and diagnosing the growth status of regenerated rice .This study measured the NDVI values of dif-ferent regenerated rice varieties （ combinations ） at key growth stages by using active spectrometer Greenseeker .Combining with the physiological indexes of regenerated rice , we analyzed and calculated the correlations of the NDVI of main rice before and after head-ing with the dry matter , LAI, and leaf nitrogen content （ accumulation ） of regenerated rice after heading .The results showed that there were significant positive correlations between the NDVI of main rice after heading and the green leaf biomass , LAI, and nitro-gen accumulation in vegetative organ and green leaf of regenerated rice after heading , and these correlations were not affected by the type of regenerated rice varieties （ combinations ） .These equations were adequately verified and de
ISSN:1001-8581