Effect of sulfur fertilizer on increasing vegetable yield and decreasing accumulation of NO-3
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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NO3-累积。莴苣菜心部分NO3-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NO3-含量,施硫肥处理比对照降低幅度更大。Abstract: 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 Sin 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 NO3-. The NO3- 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 NO3- 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.
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Key words:
- Sulfur /
- Vegetable /
- Increasing yield /
- NO3-
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[1] 中国标准出版社.中国农业标准汇编(经济作卷)[S].北京:中国标准出版社,1998.375-378. [2] 彭嘉桂,章明清.闽东南耕地土壤有效硫含量及主要粮油作物硫肥效应[J].福建农业学报,2002,17(1):49-53. -
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