【摘要】 3年的田间试验结果表明,应用不同比例的氮磷钾化肥喷施桑树,可以促进桑树的生长发育,使桑叶产量提高6.1％～16.8％,桑叶内可溶性糖、粗蛋白等含量明显增加。用处理后桑叶饲喂蚕所结茧的产量提高0.45％～7.6％,茧质（全茧量、茧层量、茧层率）也显著改善,并且在水涝年份增产幅度显著高于正常年份。在不同处理中,以0.5％CO（NH₂）₂+0.5KH₂PO₄的效果最为显著。更多还原

【Abstract】 Mulberry leaves were sprayed with different ratio of N, P, K fertilizer. Results of field test for three year showed that the treatment could increase the growth and yield of mulberry leaves, the increase range was 6.1% - 16.8% as compared with the CK, and the content of soluble sugar and crude protein also increased obviously, etc. Yield of silkworm cocoons, which were produced by silkworms that were fed with treated mulberry leaves, increased by 0.45% - 7.56% , and quality of silkworm cocoons (single cocoon weight, cocoon shell weight and percentage) also obviously could be improved. The result also showed that the yield in waterlogged years was much greater than that nomal years, and the best effect wonld be the treatment of 0.5 % CO (NH2 )2 + 0.5 % KH2PO4 .更多还原