玉米灌浆至成熟期四种密度下子粒内含物变化规律的研究

Researches on the Changes of Kernel Content of Maize among 4 Plant Densities During Filling-maturing Stage

通过测定不同种植密度的玉米子拉内含物的百粒含量（g），研究了不同种植密度条件下玉米从灌浆至成熟期的子粒子物质积累、蛋白质、脂肪、淀粉及水分含量的变化。结果显示：随子粒灌浆至成熟的进程，四种密度下玉米子粒子物质积累均呈Logistic曲线的规律变化。蛋白质、脂肪、淀粉及子粒水分含量在不同密度不变化不同，其基本变化形式为：直线（y＝b0＋b1x）变化、高次曲线变化和Logistic曲线变化。

Through determined the kernel content of maize(g/100grain). Among 4 plant densi-ties, the changes of dry matter accumulation, protein, lipid, starch and moisture in maize kernel duringfilling-maturing stage were studied. The results showed: The changes of dry matter accumulation ofmaize kernel were tally with Logistic curves among 4 plant densities; The changs of protein, lipid,starch and moisture in maize kernel were different among 4 plant densities. The basic change patterns ofthem were y=b0 + b1x.y=.