不同施氮水平对丘北辣椒生长、产量及品质的影响

通过田间试验,研究了不同氮肥施用量对丘北辣椒生长、产量和品质的影响。结果表明:(1)随着施氮量的增加,辣椒株高、分枝数、茎叶重、根重和根冠比等农艺性状指标均随之增加。N 180 kg.hm-2处理时,辣椒的株高和分杈数最高。(2)辣椒生物量和产量随氮肥施用量增加而增加。N 240 kg.hm-2处理时,生物量达到最高,为3 679.6kg.hm-2;N180 kg.hm-2处理时,产量和产值达到最高,分别为3 718.8 kg.hm-2和20 553.4元.hm-2。(3)随着施氮量的增加,辣椒果实中可溶性糖含量和可溶性蛋白质含量增加,硝酸盐积累量升高。综合考虑丘北辣椒生长、产量和经济效益等因素,丘北辣椒最佳施氮量为180 kg.hm-2。

Effects of Levels of Nitrogen Fertilizer Application on the Growth, Yield and Quality of Chilli Pepper

Effects of levels of nitrogen fertilizer application on growth, yield and quality of chili pepper was studied in the field in Qiubei County, Yunnan Province, China. The results showed that: (1) With the increases in nitrogen fertilizer application, plant height, branch number, stem weight, root weight and root cap agronomic traits increased. Plant height and branch number of plants increased with N 180 kg·hm~(-2). (2) With increases in nitrogen fertilizer application, the biomass and yield of chili pepper increased. The highest biomass 3 679.6 kg·hm~(-2) was observed with N 240 kg·hm~(-2) treatment, while the highest yield and value, 3 718.8 kg·hm~(-2) and 20 553.4 yuan·hm~(-2), respectively, were observed with N:180 kg·hm~(-2) treatment. (3) With increases in nitrogen fertilizer application, soluble sugar content, soluble protein content and nitrate accumulation increased in pepper fruit. Nitrogen 180 kg·hm~(-2) was the suitable for chili pepper, which will bring optimal yield and economic income of chili pepper.