设施菜地土壤硝态氮淋溶防控技术的研究

Study on the Technology of Soil Nitrate Nitrogen Leaching Preventive and Control in Mushroom House

在寿光有代表性的大棚里,研究了几种措施对土壤硝态氮累积和淋溶的影响。结果表明:添加秸秆调节土壤C/N,是防控土壤硝态氮淋溶最经济可行的措施。在防控土壤硝态氮累积和淋溶的效果上,T6(综合防控处理)添加了滴灌技术,在比T4(优化化肥处理)提高供肥强度的同时,最有效的减少了硝态氮的淋溶;其次就是T5(C/N调节处理),表层土壤硝态氮的累积量比T3(农民习惯施肥处理)减少49.16%,土壤硝态氮淋溶减少32.67%;再次为T4处理,表层硝态氮累积量比T3减少了39.76%,土壤硝态氮淋溶减少27.25%。

The effects of different measures on accumulation and leaching of soil nitrate nitrogen was studied in greenhouse in Shouguang. The results showed that regulating C/N of soil by adding straw is the most feasible measure to control the leaching of soil nitrate nitrogen. T6 （Comprehensive Treatment） improved the strength of fertilizer and is the most effective treatment for reduce leaching of soil nitrate nitrogen with drip irrigation. T5 （ C/N regulation Treatment） is more effective of all treatments for reduce leaching of soil nitrate nitrogen; compared with 33 （traditional convention Treatment ）, the cumulant of surface soil nitrate nitrogen and leaching amount reduce 49. 16% and 32.67% , respectively. T4 （Chemical Fertilizer Optimization Treatment）made cumulant and leaching amount reduce 39.76% and 27.25% , respectively.