【摘要】 为探明不同肥料种类氮素释放对辣椒和番茄穴盘育苗的影响,以辣椒和番茄为试材,设置不施肥（CK）、施普通尿素（Urea）、聚氨酯包膜尿素（CUrea）和淀粉包膜复合肥（SCF） 4个处理,研究聚氨酯包膜尿素和淀粉包膜复合肥静水中氮素释放特征及不同施肥处理基质氮素养分释放特征,观测辣椒和番茄幼苗生长指标。静水试验结果表明,聚氨酯包膜尿素和淀粉包膜复合肥的氮素释放周期分别是40 d和20 d。基质中氮素释放曲线结果表明,与其他处理相比,聚氨酯包膜尿素处理的NO₃^--N和NH₄⁺-N释放特征更适合幼苗生长。同时,40 d时聚氨酯包膜尿素处理辣椒和番茄的株高、茎粗、地上干质量、根干质量、全株质量和壮苗指数均显著高于其他处理。更多还原

【Abstract】 In order to study the effects of nitrogen release from different fertilizers on plug seedlings of pepper and tomato, four treatments of no fertilizer（CK）, ordinary urea（Urea）, polyurethane coated urea（CUrea）and starch coated compound fertilizer（SCF） are set up. The characteristics of NO₃^--N and NH₄⁺-N release of CUrea and SCF in still water and nitrogen release of different treatments in nursery substrate are studied, the growth indexes of pepper and tomato seedlings are observed. The release curves of NO₃^--N and NH₄⁺-N from CUrea and SCF in still water show that the releasing period are 40 d and 20 d, respectively. The release curves of NO₃^--N and NH₄⁺-N from different treatments in nursery substrate show that the nitrogen release characteristics of CUrea is more suitable for seedling growth than those of other treatments. Therefore, the plant height, stem diameter, ground dry weight,root dry weight, whole plant weight and healthy index of pepper and tomato under CUrea treatment are highest in all treatments at 40 days after sowing.更多还原