CAJ | 학술논문

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。
명학재생도두계광보수거여재생계생장적상관성，시일충예측화진단재생도생장상황적편첩방법。연구채취주동식적Greenseeker 광보의，측정료불동재생도품충（조합）관건생육기적NDVI，결합재생도적생리지표분석계산료두계추수전후적NDVI화재생계추수후적간물질、LAI화협편담함량（루적）적상관성。결과표명두계추수후적NDVI여재생계추수후적록협생물량、LAI、영양기관화록협적담루적구유현저적지수정상관，차불수재생도품충（조합）류형적영향。이용불동밀도시험적수거대방정진행료교충분적험증화검측，표명모의치여실측치지간부합도교고，고산정도위0．9765，고계적RMSE위1．464，평균상대오차위－0．1191，RRMSE위0．1814。
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 detected by using the data of field experiments with different densities , and the results indicated that the degree of conformity was higher between the simulated values and measured values , the estimated accuracy was 0.9765, the estimated RMSE was 1.464, the average relative error was-0.1191, and RRMSE was 0.1814.