期刊论文

Wang, C.-H.

中文

生态与农村环境学报

1673-4831

2006

22

4

62-66

10.3969/j.issn.1673-4831.2006.04.013

02SSY3033:湖南省科技攻关计划 04ZH3053:湖南省科技攻关计划

本校为第一且通讯机构

通过田间小区试验,采用NPK肥3因素5水平正交旋转组合设计,研究冲积菜园土上施用化肥对萝卜产量和硝酸盐含量的影响.结果表明,低N与中高量PK肥配施既可保证萝卜最适产量,也可降低萝卜硝酸盐含量；回归和频数分析得出,萝卜产量达实际最高产量90%～95%左右,同时其硝酸盐含量降低至1057～1218 mg·kg~(-1)的最佳NPK肥配比为N 100～141 kg·hm~(-2)、P 84～100 kg·hm~(-2)和K 220～279 kg·hm~(-2).

Effects of NPK ratio in fertilization on yield and nitrate content of radish were studied by means of field plot experiment laid out according to the orthogonal rotation combination method with three factors and five levels in the river alluvial vegetable soil. Results indicate that the application of a low rate of nitrogen fertilizer coupled with mid-high rates of phosphate and potassium fertilizers led to optimum yield and lower nitrate content of radish. Regression and frequency analysis revealed that the optinum combination of the three fer...