施氮量对生姜群体光合特性及产量和品质的影响

Effects of nitrogen rates on colonial photosynthesis,yield and qualities of ginger

幼苗期随施N量的增加 ,生姜群体扩展加快 ,盛长期过多的N不利于生姜生长 ,而以施N6 0 0kg/hm2 处理最佳。不同施N量处理的生姜群体光合速率 (CPn)的季节变化为单峰曲线 ;日变化在幼苗期为双峰曲线 ,盛长期为单峰曲线。施N水平可显著影响生姜产量与品质 ,施N6 0 0kg/hm2 处理产量达 4 5330kg/hm2 ,较不施N及施N 12 0 0kg/hm2 处理分别增产 6 1 1%和2 3 7%

A field experiment was conduced to study on the application of nitrogen fertilizer on ginger growth The results showed that the colony of ginger developed rapidly with nitrogen fertilizer increase at seedling stage, but too much nitrogen was not favorable to the growth of ginger at vigorous growth stage, and application of N 600kg/hm 2 on ginger growth was suitable The seasonal changes of colonial photosynthesis(CPn)with different nitrogen rates was in a single peak curve, the diurnal changes of CPn was a double peak curve at seedling stage and in a single peak curve at vigorous growth stage The yield and qualities of ginger was significantly affected by nitrogen level, the yield of ginger was 45330kg/hm 2 in application of N 600kg/hm 2, which was 61 1% and 23 7% higher than the control and application of N 1200kg/hm 2, respectively The ginger yield with high nitrogen level decreased due to economic coefficient reduced