摘要
针对哈尔滨市辖区部分设施蔬菜土壤硝酸盐污染现状,在五常市五常镇、香坊区光明村蔬菜基地开展硝酸盐污染改良剂的应用研究,通过田间小区试验,研究4种改良剂产品对种植土壤硝酸盐、硝态氮含量,番茄产量、硝酸盐含量及品质的影响。结果表明:4种处理对土壤中硝酸盐和硝态氮含量影响均呈现明显下降趋势,较对照(CK)达显著水平,其中腐植酸+EM菌+双氰胺(HA+EM+DCD)处理效果最为显著,其次为处理EM+DCD、HA+DCD和DCD;番茄产量HA+EM+DCD处理效果最为显著,两地番茄产量为106.11kg/20m2和97.26kg/20m2,比CK增产11.2%和21.7%,达到显著性差异(P<0.05);4种处理对番茄中硝酸盐含量降幅均达40%以上,处理EM+DCD、HA+EM+DCD好于处理DCD、HA+DCD,并达显著差异水平;3种处理对番茄Vc、可溶性糖含量及糖酸比均有促进作用,显著改善番茄品质,试验效果HA+EM+DCD>HA+DCD>EM+DCD。综合评价,改良剂的试验效果依次为HA+EM+DCD>HA+DCD>EM+DCD>DCD。
In view of the present situation of protected vegetable soil nitrate pollution in Harbin. The effects of nitrate pollution modifiers application was studied in Wuchang town, wuchang city and Guangming village, Xiangfang district vegetable base. The effectiveness of four kinds of modifiers on soil nitrate content, soil nitrate nitrogen, tomato yield, tomato nitrate content and tomato quality were studied in plot experiment. The results showed that there is a downward trend in four kinds of treatments showed. It had significant level compared with the control （CK）.Secondly, the humic acid＋EM mud＋ dicyandiamide （HA＋EM＋DCD）treatment had the most significant effect, followed by EM＋DCD、HA＋DCD and DCD treatment.HA＋EM＋DCD had the most significant treat-ment effect on tomato yield. Tomato yield was 106.11kg/20m2 and 97.26kg/20m2 in two experiments place increased by 11.2% and 21.7% compared with control which reached significant difference （P〈0.05）.The average content of nitrate was more than 40% in four kinds of treatments. EM＋DCD and HA＋EM＋DCD were better＆amp;nbsp;than DCD and HA＋DCD which reached significant difference. Three kinds of treatment were promoted on tomato Vc, soluble sugar content and sugar acid ratio. The quality of tomato was sig-nificant improved. The result was HA＋EM＋DCD〉HA＋DCD〉EM＋DCD.Comprehensive evaluation of modifier results were HA＋EM＋DCD〉HA＋DCD〉EM＋DCD〉DCD.
出处
《国土与自然资源研究》
2014年第2期56-59,共4页
Territory & Natural Resources Study
基金
哈尔滨市科技创新人才研究专项资金项目(2012RFQYN103)
关键词
番茄
硝酸盐污染
番茄品质
产量
硝态氮
tomato
nitrate pollution
tomato quality
yield
nitrate nitrogen
