Effects of Row Spacing on Population Quality and Grain Yield of Winter Wheat Cultivar Xinmai-26
SHENG Kun
ZHANG Luyan
GUO Yuqiang
ZHAO Jiulin
YANG Lijuan
MA Huaping
Abstract：In order to study the effects of row spacing on population dynamic changes, leaf area index (LAI),dry matter accumulation ( DMA) and grain yield of Xinmai-26, a compact multi-spike winter wheat cultivar, a two-year field experiment with randomized block design was conducted. The results showed that all the parameters tested had significant difference among the three row spacing treatments, and were consistent between the two growing seasons. The population and LAI increased with the decrease of row spacing. The maximum population,earbearing tiller ratio and maximum LAI were the highest in the treatment of 15 cm. The decline of LAI in treatment 15 cm was the slowest after anthesis. Taking effective accumulated temperature as independent variable, three equations were established by Richards growth curve to simulate the dynamic of DMA,the R2 of which were more than 0. 996. The initial rate,average rate and final amount of DMA in treatment 15 cm were also the highest. Narrowing row spacing could de-crease the grain number per spike,but increase the spike number per hectare,1 000-kernel weight and grain yield. The average yield of treatment 15 cm in two years was 4. 8% and 9. 5% higher than that of treatment 20 cm and 25 cm, respectively. Therefore, the optimum row spacing for compact multi-spike wheat variety Xinmai-26 was 15 cm.
Keywords：row spacingwinter wheatXinmai-26population qualitygrain yield
Publication Date：2015-03-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 26-30 )