镁对水稻糖、淀粉积累与运转的影响

Effect of Magnesium on Accumulation and Transportof Sugar, Starch in Rice

溶液培养试验结果表明．缺镁水稻各生育期叶绿素含量及光合速率显著降低；充足的镁提高水稻主茎和分蘖的糖、淀粉含量，促进成熟期碳水化合物由茎鞘向穗部运转，水稻有效穗、结实率和千粒重提高。产量较缺镁处理有极显著的增加．

The results of hydroponic experiment showed that magnesium deficiency decreased chlorophyll contents and net photosynthetic rates at stages.At tilling stase, magnesium application increased sugar and starch contents in main stalk and tiller. At filling stase, magnesium stimulate transport of carbohydrate from stalk to ear. Fertilization of magnesium enhanced the number of effective panicles, the percentase of full grains and the weight of thousand grains, significantly increased the grain yield.