芹菜生产中的有机无机肥最佳配比研究

目的]研究有机无机肥配比对芹菜产量和NO3^- -N含量的影响，为绿色蔬菜生产中的有机无机肥配合施用提供科学依据。方法]温室条件下，以芹菜为蔬菜代表，设计了鸡粪与尿素5个配比处理，3次重复的田间试验，对试验结果进行数据统计分析。结果]随施用无机氮质量百分数增加，NO3^- -N含量呈明显增加趋势；生产NO3^- -N量≤785mg/kg的绿色蔬菜标准芹菜，无机氮百分数应≤35．6％；最高产量的有机无机肥配比是29．2％：70．8％；产量相对较高，经济效益最佳的有机无机肥配比为64．4％：35．6％，此时的产量为76528kg/hm^2，相当于最高产量的95．8％，纯收益为97606元／hm^2，比纯用化肥增加收益28．6％，比纯用有机肥增加收益16．2％，比最高产量时增加收益25．2％。结论]增加有机肥投入量，降低化肥比例，实现绿色蔬菜生产、达到增产增收是可行的，绿色芹菜生产中的经济效益最佳的有机无机肥配比为64．4％：35．6％。

Research on the Best Ratio of Organic and Inorganic Fertilizer in the Celery Production

Objective] The scientific basis of the green vegetable was provided through the study on the ratio of organic and inorganic fertilization in celery production and the test of NO3——N content.Method] The field experiment in celery cultivation in greenhouse with 5 different treatments of chicken manure and urea conditions and 3 repetitions was conducted and the test results were statistically analyzed.Results] With the ratio of application of inorganic nitrogen, the content of NO3——N showed a marked increment;in the standard green celery products with the content of NO3——N of ≤ 785 mg/kg,the percentage of inorganic nitrogen should be ≤ 35.6% and the ratio of organic and inorganic in fertilizer the highest yield was 29.2%∶70.8%.While the yield was relatively high,the ratio of organic and inorganic fertilizer with the best economic benefits was 64.4%∶35.6%, at that condition,the yield was 76 528 kg/hm2,which was equivalent to 95.8% of the maximum yield,pure income was 97 606 yuan/hm2,with more 28.6% net income-increasing than that from the application of pure chemical fertilization;more 16.2% net income than that from the application of organic manure and more 25.2% net income than that from the measure while it was the highest yield.Conclusion] It was feasible to increase the organic manure,to reduce the chemical fertilizer for green vegetable production and the best ratio of organic and inorganic was 64.4%∶35.6%.