摘要
在田间栽种玉米,并按氮、磷肥的不同施用量分为10种情况处理。在不同生长期进行了生长形态指标测量和活体叶片的荧光光谱与激光诱导荧光光谱测量,并测试了叶片浸出液的荧光光谱。结果表明,不同的施肥条件.不仅使玉米在长势上有所反映,而且还会引起光合作用效率和叶绿素含量等的变化,因而导致了玉米叶片荧光光谱的变化。利用440,550,685nm等处的荧光强度可探测玉米的养分供应状况,当利用它们的比值时,表征更为明显。这就为遥感监测玉米的长势和估产提供了新的途径和可靠依据。从玉米的需肥情况、农时、荧光光谱的差异性以及遥感的可行性来看,在拔节期是遥感监测的最佳时期。
Corn was planted in field under different treatments of fertilizer application, and indices of corn growth shape, fluorescence spectra, laser induced fluorescence spectra of live leaves as well as fluorescence spectra of the extracting solution of leaves were measured in the different growth stages. The results showed: 1) different conditions of fertilizer application not only are expressed in corn growth vigors, but also affected the efficiency of photosynthesis and the content of chloro-phyl as well as the fluorescence spectra of corn, 2) peak intensities of 440nm, 550nm and 685 nm can be used to monitor the nutrient supplying condition of corn, and it will be better to use ratios of those peak intensities. The study provided a new approach and reliable basis for monitoring the growth shape and estimating the yield of corn using laser induced fluorescence technology of remote sensing. The optimum monitoring period is jointing stage of corn due to the requirment of fertilizer, farming season, disparity of fluorescence spectra as well as the possibility of remote sensing.
出处
《遥感学报》
EI
CSCD
1992年第S1期51-59,共9页
NATIONAL REMOTE SENSING BULLETIN
关键词
玉米
施肥
遥感
激光诱导荧光光谱
Corn Fertilizer application Remote sensing Laser inducced fluorescence spectra
