【摘要】 研究了浅水位条件下麦菜轮作体系中夏甘蓝生长季节有机肥施用量对土壤剖面硝态氮积累、夏甘蓝产量和品质的影响。结果表明:夏甘蓝生长季节正值雨季,导致各处理硝态氮累积峰值出现在靠近地下水位处,并随有机肥用量的增加土壤剖面硝态氮累积量增多。有机肥用量增加导致甘蓝中白利糖度降低,但对其他品质指标没有影响;尽管大量使用有机肥导致土体剖面硝态氮的累积,由于淋洗作用,耕层硝态氮含量并不太高,有机肥用量对甘蓝中硝酸盐含量没有影响。因此,在绿色蔬菜生产中,应该避免盲目大量地使用有机肥料,以免增加污染环境风险和影响蔬菜品质,确保绿色食品产地环境质量。更多还原

【Abstract】 Effects of manure application amount on soil nitrate accumulation in soil profile,yield and quality of cabbage grown in summer seasons under conditions of shallow ground water table were studied.The precipitation during cabbage was grown following wheat was high and resulted in nitrate accumulation peak appeared near ground water table.More manure was applied,more nitrate-N accumulated in soil profile.The sugar content(Brix(%)) in cabbage decreased with the increase of manure application amount.Manure application amount did not influence Vc and crude fibrous content.Nitrate-N content in 0-20 cm soil layer was not affected by manure application because of leaching.As a consequence,nitrate content in cabbage was similar among different treatments.更多还原