【摘要】 以"京欣2号"西瓜为试材,研究了不同供N量和供K量对西瓜生长状况、产量及品质的影响。结果表明:在该试验条件下,供N量和供K量的增加均能加速西瓜营养生长,提高西瓜的光合能力,增加产量,但当供N量超过129.68kg/hm2时,西瓜的光合能力降低、品质下降,且增产效果减弱;供K量对西瓜营养生长的影响不如供N量明显,但西瓜的品质指标均随供K量的增加而上升。供N量为129.68kg/hm2,供K量为158.55kg/hm2时,西瓜长势稳定,产量高、品质好,综合效果最优。更多还原

【Abstract】 ’Jingxin No.2’watermelon was used as material,the effects of different fertilizer amounts of nitrogen and potassium on the growth,yield and quality of watermelon in plastic film shelter were studied.The results indicated that the improvement of nitrogen or potassium supply could promote the vegetative growth,photosynthetic ability and yield of watermelon.When the nitrogen supply was over 129.68 kg/hm2,the photosynthetic capacity dropped,the quality of fruit and the effect of nitrogen on enhancing yield declined.The effect of potassium supply on vegetative growth was not the same obvious as nitrogen supply.But the quality of fruit obviously got better when improving the amount of potassium supply.When the amount of nitrogen was 129.68 kg/hm2,the amount of potassium was 158.55 kg/hm2,watermelon grew well,got high yield and best quality.更多还原