硫对蔬菜的增产及降低NO_3^-累积效应研究  

Effect of sulfur fertilizer on increasing vegetable yield and decreasing accumulation of NO^(-)_(3)

作　　者：彭嘉桂[1] 杨杰[1] 林琼[1] 章明清[1] 蔡顺香[1] 李娟[1] 

机构地区：[1]福建省农业科学院土壤肥料研究所,福建福州350013

出　　处：《福建农业学报》2004年第3期160-163,共4页Fujian Journal of Agricultural Sciences

基　　金：福建省科技厅资助项目;国际硫研究所资助项目(2001I011)

摘　　要：23个菜园表层土壤样品分析结果,土壤全硫平均含量354.9 mg·kg-1,有效硫平均含量26.2 mg·kg-1,有效硫占全硫7.4％;有效硫小于16 mg·kg-1临界值样品占43.6％。田间不同硫水平对比试验和简比试验结果表明,莴苣、花椰菜等多种蔬菜品种,在每公顷施用硫15-60 kg范围内,都具有不同程度增产效应;硫素还可改善蔬菜品质、降低NO-3累积。莴苣菜心部分NO-2含量比对照降低13.0％-56.0％,花椰菜降低24.8％-48.7％,空心菜降低8.2％-56.0％。而在网室土培、水培试验结果,供试空心菜、小白菜植株NO-3含量,施硫肥处理比对照降低幅度更大。The analyzed results of 23 vegetable superficial soil samples showed that total S content in soil was 354. 9 mg·kg-1 and available S content was 26. 2 mg·kg-1. The content of available S in 43. 6% samples was lower than critical value (16 mg·kg-1) and available S accounted for 7.4% of the total S. The experiment results showed that yields of Lactuca satiua and Brassica oleraclai increased by sulfur fertilizer at the dosage of 15-60 kg·hm-1. Sulfur nutrient could also improve vegetable quality and decrease accumulation of NO-3. The NO-3 content in the center part of Lactuca satiua, Brassica oleraclai and swamp cabbage decreased by 13.0%-56. 0%, 24.8%-48.7% and 8. 2 %-56. 0% respectively compared with the control. The NO-3 content in plant of swamp cabbage and litter cabbage applied sulfur fertilizer at pot experiment or liquid experiment in net house decreased more than that in field experiment.

关 键 词：硫 蔬菜 增产 NO3^- 

分 类 号：S143.71[农业科学—肥料学]