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应用N肥施用量单因素设计,研究银川平原二代节能日光温室番茄对N肥的反应。结果表明:供试土壤供肥特点变现为低N、高P、高K,且因施肥量大而排水不畅,土壤表现为轻度盐渍化特征;N素是决定番茄产量最主要的影响因子;供试土壤具有极高的速效P、K供应水平,达到高产时对P、K的需要量较少。667m2范围内,施N肥0~80kg,番茄产量随施N量的增加而呈先增加、后降低的趋势,番茄达到较高产量时的N肥适宜用量为40~60kg。
The application of N fertilizer application of single factor design, Yinchuan plain second generation energy-saving greenhouse tomato N response. The results showed that the characteristics of fertilizer supplied to the soil were low N, high P and high K, and the drainage was poor due to the large amount of fertilizer application. The soil showed mild salinization characteristics. N was the most important factor determining tomato yield Factor. The tested soil had extremely high available P and K supply levels, and less P and K needed to reach high yield. 667m2 range, N fertilizer 0 ~ 80kg, tomato yield increased with the amount of N was first increased, then decreased, the tomato reached a higher yield of N fertilizer suitable for the amount of 40 ~ 60kg.