墨西哥专用青饲玉米最佳种植密度研究

The Optimum Planting Density of Mexico Maize Variety for Special Fresh Fodder

采用不同种植密度方式对墨西哥专用青饲玉米的最佳种植密度及生长规律进行了研究。结果表明 :最佳种植密度为 45 0 0株 / 6 6 7m2 ,其生物学产量最高 ,可达 45 96 .7kg/ 6 6 7m2 ;不同密度植株生长表现为株高、主茎叶片数、再生株高和再生主茎叶片数均符合 6种生长模型 ,即株高用 y =aebx,主茎叶片数用 y =axb,再生株高和再生主茎叶片数用 y =a +bx拟合效果较好 ,分蘖规律遵循 y =c(1 +aebx) -1 ,求出快慢拐点是 6 0 0 0株 / 6 6 7m2 出现最早 ,2次割青 ,株高。

The optimum planting density and growth rhythm of the Mexico maize variety for special fresh fodder were (investigated) by using different planting densities. The results show that the biological yield is up to 68950.5kg/ha under density of 67500plants/ha. The plant height and leaf number of main stem, and regenerated plant height and leaf number of regenerated main stem under different densities accord with six mathematic models. The mathematic models of y=ae^(bx), y=ax^(b), y=a+bx and (y=c(1=ae^(bx))) are used for plant height, leaf number of main stem, regenerated plant height and leaf number of regenerated main stem, and tiller rhythm respectively. There are very significant positive correlation in two-cut, plant height, leaf number of main stem and tiller under (different) plant densities.