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为给旱薄区夏玉米的优质高产栽培提供施肥依据,研究了不同矿质元素氮、磷、钾、锌、锰和硼配施对夏玉米长势、光合特性及地上部干物质积累的影响效应。结果表明不同矿质养分之间的配合施用,特别是氮钾与微肥锌、锰和硼配合施用时其相应的株高和茎粗比对照提高,达极显著差异水平。玉米的叶面积指数(LAI)、光合速率、光合势在不同矿质元素的作用下,反应曲线均为单峰曲线,其中LAI和光合速率在玉米吐丝期出现最大值,而光合势最大值出现在灌浆期。地上部干物质积累量也以NKZn、NKMn、NKB和NPK配合施用为最高。因此NKZn、NKMn、NKB和NPK配合施用对于改善玉米生长性状、光合特性与干物质积累均具有重要作用。
In order to provide fertilization basis for high yielding and high yielding cultivation of summer maize in the dryland area, the effects of different mineral elements nitrogen, phosphorus, potassium, zinc, manganese, and boron on the growth, photosynthetic characteristics and aboveground dry matter accumulation of summer maize were studied. The results showed that with the application of different mineral nutrients, especially the corresponding plant height and stem diameter increased with the application of nitrogen, potassium and trace elements Zn, Mn and B, reaching the extremely significant difference. Leaf area index (LAI), photosynthetic rate and photosynthetic potential of maize showed single peak curve under the action of different mineral elements, in which the LAI and photosynthetic rate appeared the maximum in silking stage and the maximum value of photosynthetic potential appeared In the filling period. Aboveground dry matter accumulation was also highest with NKZn, NKMn, NKB and NPK. Therefore, the combined application of NKZn, NKMn, NKB and NPK plays an important role in improving the growth traits, photosynthetic characteristics and dry matter accumulation of maize.