【作者】 王荣萍； 李淑仪； 张育灿； 邓许文； 古幸福； 龚劲波； 廖新荣； 蓝佩玲；

【Author】 WANG Rong-ping1, LI Shu-yi1, ZHANG Yu-can2, DENG Xu-wen3, GU Xing-fu4, GONG Jin-bo4, LIAO Xin-rong1, LAN Pei-ling1 1.Guangdong Institute of Eco-environmental and Soil Science, Guangdong Key Laboratory of Agricultural Environment Integrated Control, Guangzhou, Guangdong 510650, China; 2.Guangdong General Station for Soil and Fertilizer, Guangzhou, Guangdong 510650, China; 3.Gaoming Agriculture Science Center of Guangdong, Gaoming, Guangdong 528500, China; 4.Huiyang Agriculture Center of Guangdong, Huiyang, Guangdong 516200, China

【机构】 广东省生态环境与土壤研究所广东省农业环境综合治理重点实验室； 广东省土壤肥料总站； 广东高明农科中心； 广东惠阳农技推广中心；

【摘要】 在田间试验条件下研究不同氮肥品种和底施追施比例对小白菜产量和营养品质的影响。结果表明,施氮极显著提高了小白菜的生物量和产量,亦增加了硝酸盐的累积量,其中尿素处理增产效果最好,蔬菜专用肥(磷铵+尿素)处理小白菜硝酸盐累积量最低,其次是碳酸氢铵和氯化铵处理,各氮肥处理间Vc和可溶性糖含量差异达到极显著水平,其中蔬菜专用肥处理含量最高;不同底、追肥处理间产量和Vc含量的差异达到显著或极显著水平,而可溶性糖含量差异未达到显著水平,除底肥70%追肥30%处理外其余处理均极显著提高了硝酸盐含量。在本试验条件下,蔬菜专用肥既可以提高小白菜产量,又可以明显改善小白菜营养品质与卫生品质,如果以尿素为氮源,底肥70%追肥30%是兼顾产量和品质的优化处理。更多还原

【Abstract】 Field experiments were conducted to study the effects of nitrogen fertilizers and basal-/top-dressing ratio on yield and quality of pakchoi cabbage. The results showed that applying with N fertilizer could increase the yield and increment of urea was higher than others. Applying N fertilizer could result in nitrate accumulation, however nitrate accumulation of special fertilizer treatment was the lowest, followed with ammonium bicarbonate and ammonium chloride. There were significant differences of vitamin and soluble sugar content between these nitrogen fertilizer treatments that had identical N rate, and contents of vitamin and sugar were remarkably higher in the treatment applying with special fertilizer for vegetable. With identical N applying, yield and vitamin content were different significantly among treatment with the rate of different base top dressing, however there was no difference in the content of soluble sugar. Compared with CK, when base fertilizer was 70% and dress fertilizer was 30% nitrate contents were decreased, however nitrate contents of other treatments were increased significantly. Under the field fertility of this experiment, the treatment, which was base 70% and dress 30% with the applying urea, was the optimal treatment taking account of yield and quality. Applying with special fertilizer for vegetables could not only improve yield but also reduce nitrate accumulation in the pakchoi cabbage.更多还原