摘要
以不结球白菜品种华王为材料,设施纯N_0 kg/hm^2、50 kg/hm^2、100 kg/hm^2、200 kg/hm^24个施氮水平(N_0~N_3)以及0 kg/hm^2、138 kg/hm^2、276 kg/hm^2、552 kg/hm^24个施硅(Na_2SiO_3)水平(Si_0~Si_3),对不结球白菜的氮、磷、钾和硅吸收量、叶片色素含量、光合速率、体内硝酸盐含量、Vc含量进行了测定。结果显示,在不施氮水平下,硅显著提高了不结球白菜体内的硝酸盐含量,而在施氮处理下,施硅显著降低了小白菜的硝酸盐含量,例如N_2Si_1处理的硝酸盐含量比N_2Si_0处理的硝酸盐含量降低了21.7%;适宜的氮硅配施可提高不结球白菜叶片的产量、光合速率及Vc含量,还可降低不结球白菜体内硝酸盐含量,在一定程度上改善不结球白菜的食用安全性。
The integrated effect of nitrogen （ N） and silicon （ Si） on the production and quality of Brassica chinensis was studied. Taking Huawang, the variety of B. chinensis, as reseach object, a pot experiment was conducted by completely randomized block design in 2014. The N levels （ N0—N3 ） were 0 kg/hm^2 , 50 kg/hm^2 , 100 kg/hm^2 and 200 kg/hm^2 , and Si levels （Si0—Si3） were 0 kg/hm^2, 138 kg/hm^2, 276 kg/hm^2and 552 kg/hm^2. The contents of N, P, K, Si, nitrate, pigment, vitamin-C （ Vc） and photosynthetic rate of B. chinensis were determined. Results showed Si application increased the nitrate contents of B. chinensis without N application, but significantly decreased nitrate contents with N application. The nitrate content in N2 Si1 treatment was lower than that in N2 Si0 treatment by 21-7%. Combined application of N and Si in-creased the photosynthetic rate, the yield and Vc content of B. chinensis, and decreased the nitrate content, consequently improved product safety and quality.
作者
张国芹
牟建梅
何玲莉
徐瑶
陈新
ZHANG Guo-qin MOU Jian-mei HE Ling-li XU Yao CHEN Xin(Institute of Agricultural Sciences in Taihu Lake District, Suzhou 215155, China Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)
出处
《江苏农业学报》
CSCD
北大核心
2016年第5期1128-1133,共6页
Jiangsu Journal of Agricultural Sciences
基金
苏州市应用基础项目(SYN201326)
苏州市科技支撑项目(SNG201437)
关键词
不结球白菜
硅肥
氮肥
产量
品质
Brassica chinensis
silicon fertilizer
nitrogen fertilizer
yield
quality
