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不同施肥方案对设施菜田土壤氨挥发及番茄生长的影响

Effects of Different Fertilization Schemes on Soil Ammonia Volatilization and Tomato Growth in the Facility Vegetable Field

  • 摘要: 以番茄为研究对象,采用密闭式集气法对各施肥方案的氨挥发进行田间定位监测,研究了不同施肥方案下设施菜田土壤的氨挥发速率、累积量及番茄产量,以期探明不同施肥模式下设施菜田土壤氨挥发损失的基本规律和减少氨挥发损失的主要施肥技术,为氮肥的合理施用提供参考依据。结果表明:不同施肥处理番茄生育期氨挥发累积量表现为CK>T3>T6>T1>T2>T5>T4。其中,T4处理氨挥发累积量最低为4.29 kg·hm-2,比CK低27.78%;T5、T2、T1、T6、T3处理氨挥发累计量比CK分别降低25.93%、23.10%、22.63%、19.04%、12.08%。基肥、第2次追肥施入7 d内氨挥发累积量合计占全生育期氨挥发总量的54.47%~66.18%,施肥量和温度可能是影响氨挥发的主要原因。番茄产量表现为T6>T2>T5>T3>CK>T1>T4,T6处理产量最高达88 204.04 kg·hm-2,较CK增产38.84%,且氨挥发累计量较小。综合番茄产量及环境效益,该区域推荐的设施番茄施肥方案为T2、T3、T5、T6。减少化肥施用,合理配施有机肥、微生物肥、水溶肥等,可显著降低土壤氨挥发,提高番茄产量,节约施肥成本。

     

    Abstract: Tomato was selected as the research object.The closed gas collection method was used to monitor the ammonia volatilization of each fertilization scheme in the field.The ammonia volatilization rate, accumulation of facility vegetable soil and tomato yield under different fertilization schemes were studied, in order to effectively reduce soil ammonia volatilization, improve tomato yield and rational fertilization.The results showed that the cumulative amount of ammonia volatilization during tomato growth period under different fertilization treatments was as follows, CK>T3>T6>T1>T2>T5>T4.Among them, the lowest cumulative amount of ammonia volatilization of T4 was 4.29 kg·hm-2,which was 27.78% lower than that of CK.The cumulative amount of ammonia volatilization of T5,T2,T1,T6 and T3 were 25.93%,23.10%,22.63%,19.04%,12.08% lower than CK,respectively.The cumulative amount of ammonia volatilization within 7 days of basal fertilizer and second top-dressing application accounted for 54.47%-66.18% of the total ammonia volatilization during the whole growth period.The amount of fertilizer and temperature may be the main reasons affecting ammonia volatilization.The yield of tomato was T6>T2>T5>T3>CK>T1>T4.The yield of T6 was as high as 88 204.04 kg·hm-2,which was 38.84% higher than that of CK,and the cumulative amount of ammonia volatilization was small.Comprehensive tomato production and environmental benefits, the recommended fertilization program for facility tomato in this area was T2,T3,T5,T6.Through reducing the application of chemical fertilizer and the rational application of organic fertilizer or microbial fertilizers or water-soluble fertilizers in tomato production in greenhouse, the soil ammonia volatilization could be significantly reduced, and the yield could be increased, the cost of fertilization would be saved.

     

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