摘要
通过盆栽试验研究氮肥不同用量和基追比例对芹菜的产量效应和品质效应。本试验条件下,施氮量为150mg/kg土时(约相当于337.5 kg/hm2)芹菜产量最高,继续增施氮肥,产量显著降低。施氮量为100 mg/kg土时(约相当于225 kg/hm2),Vc含量和可溶性糖含量最高,施氮量增加,芹菜品质显著降低。芹菜叶绿素、硝酸还原酶活性和硝酸盐含量与氮肥用量呈极显著的线性正相关。不同氮肥用量处理的芹菜在不同生育期的硝酸盐积累量均呈明显的“S”曲线。基肥N占100%时,芹菜的生长情况最好,基肥N占50%时,芹菜的叶绿素含量,硝酸还原酶活性,Vc和可溶性糖含量均最大。追施一次肥处理的芹菜叶片硝酸盐含量显著低于追两次肥的处理。
The influence of nitrogen dosage and the ratio of basic and supplemental fertilizer on growth, yield and quality of celery were studied through pot experiment. Results showed that the nitrogen dosage was 150 mg/kg, the celery yield was highest, more nitrogen application would make the yield decreasing significantly. The nitrogen application was 100 mg/kg, the content of vitamin C and soluble sugar were highest, more nitrogen application would make the quality decreasing significantly. Chlorophyll, NRA and nitrate content was positively related to the nitrogen rates. In different nitrogen rates treatments, nitrate accumulation showed “s” curve during the growth period of celery. When basic fertilizer was 100%, the yield of celery was highest. When basic fertilizer was 50%, Chlorophyll, NRA, vitamin C and soluble sugar were highest. The nitrate content of celery was significant lower in supplemental fertilizer once than twice.
出处
《土壤肥料》
CSCD
北大核心
2005年第5期8-12,16,共6页
Soils and Fertilizers
基金
四川省科技厅"十五"攻关项目(02NG004-004)
关键词
氮肥
芹菜
基追肥比例
品质
nitrogen
celery
ratio of basic and supplemental fertilizer
quality
