不同耐密性玉米品种对密度的光谱特征响应

借助新型光谱仪SPAD-502叶绿素仪与AccuPAR植物冠层分析仪，研究了不同耐密性玉米品种对密度的光谱学特征响应，阐述不同密度对玉米光合性能的影响。选用益农103、先玉335、郑单958和登海661这4个品种为主要试验材料，采用行距固定（80×40 cm大小行）、株距从1 m开始由大至小的“渐密”种植方式，形成13个种植密度，分别为3.33，3.70，4.17，4.50，4.76，5.56，6.67，6.80，8.33，9.00，11.11，11.20和16.67株·m-2。通过测定叶绿素含量与冠层特征来表征其光谱特征，研究渐密种植方式下植株对密度的光谱特征响应，探讨高产条件下的玉米植株光合特征及密度-产量关系。是利用玉米的光谱特征反映植株光合特性、冠层结构功能，以研究碳四作物对密度等栽培措施响应的范例。

Spectra Characteristic Effect of Different Density-Resistant Maize Variety on Planting Density

With Chlorophyll Meter SPAD-502 and Canopy Analyzer AccuPAR LP-80, the spectra characteristic effect of different density-resistant maize variety on planting density was studied, and the effect of planting density on photosynthetic performance of maize was discussed. The materials of the experiment were Yinong-103, Xianyu-335, Zhengdan-958 and Denghai-661, the row spacing was 80 cm×40 cm, the plant spacing was gradually changed from 1m to smaller spacing, the densities were 3.33, 3.70, 4.17, 4.50, 4.76, 5.56, 6.67, 6.80, 8.33, 9.00, 11.11, 11.20 and 16.67 planting·m-2 respectively. We studied spectra characteristic effect on planting density, and investigated maize photosynthetic characteristics and density-yield relationship to get high yield. This research can be good case of using maize spectra characteristic to reflect plant photosynthetic characteristics and canopy architecture. The end of this paper was to explore density effect on yield with spectroscopy means.