Effects of nitrogen fertilization on matter translocation of winter wheat cultivars at their grain-filling stage in sub-humid farmland ecosystem

Abstract

Abstract: A field experiment was carried out on the south Loess Plateau with an annual precipitation of 632 mm to study the effects of nitrogen fertilization on the matter translocation of winter wheat cultivars NR9405,9430,Yanshi No.9,Xiaoyan No.6,Shan 229,Xinong 2208,Aifeng No.3 and Sang 188 at their grain-filling stage.The results showed that there was no significant difference among different winter wheat cultivars in the dry matter production of green leaf,spike and stem at anthesis stage,and of leaf,hull and rachis at maturing stage,while a significant difference was observed in the dry matter production of old leaf and stem at anthesis stage,and of stem and grain at maturing stage.Nitrogen fertilization could significantly increase the dry matter production at anthesis and maturing stages.Among the test winter wheat cultivars,NR9405 had the highest dry matter translocation(DMT),dry matter translocation efficiency(DMTE),and dry matter translocation proportion for grain(DMTP),but Yanshi No.9 had the lowest ones.The DMT,DMTE and DMTP had a significant correlation with winter wheat cultivar and nitrogen fertilization.

Key words: ICP-AES, Rare earth elements, Soil, Dicranopteris dichotoma, Distrbution, Transportation

CLC Number:

Q945.11

FAN Yaning, LI Shiqing, WU Weimo, SHAO Mingan. Effects of nitrogen fertilization on matter translocation of winter wheat cultivars at their grain-filling stage in sub-humid farmland ecosystem[J]. cje, 2005, (12): 1402-1408.

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