氮素用量及施肥方法对菜豌豆根瘤量和产量的影响

针对玉溪市菜豌豆生产上存在过量施肥和施肥方法不当的问题，采用田间试验方法开展研究，结果表明，N素不同用量、种肥施用N肥比例和磷肥比例的大小或施与不施均对菜豌豆根瘤干重和豆荚产量有明显影响；菜豌豆种肥不宜施用氮肥，而磷肥可作种肥施用；以N 600~750 kg/hm2、P2O5 60 kg/hm2、K2O 75 kg/hm2的施肥结构，并采用种肥不施N肥、追肥12~15次、磷肥50%~100%作种肥施用的施肥技术，小荚豆和甜脆荚豆的菜豌豆产量最高。

Effect of Nitrogen Fertilizer Amount and Application Methods on Root Nodulesand Yield of Edible-podded Pea

In the pea field,nitrogen fertilizer amount and application methods were studied for edible-podded pea production in Yuxi City,where nitrogen has been applied much more than pea needs.The results showed that nitrogen amount and rate to phosphorus fertilizer had significant effect on dry weight of root nodule and fresh pea pod.Nitrogen fertilizer was not suitable for seeding,but phosphorus was well.Fresh pea yield increased most when no nitrogen and 50%-100% phosphorus fertilizer were used during seeding and then 600-750 kg/hm^ 2 nitrogen,60 kg/hm^ 2 P 2 O 5 and 75 kg/hm^ 2 K 2 O were applied for 12-15 times.