香水菠萝氮磷钾施肥效应和适宜施用量

以香水菠萝为研究对象,采用"3414"施肥试验方案开展大田试验,研究氮、磷、钾肥不同施用量对香水菠萝产量和经济效益的影响,探讨海南香水菠萝生产适宜的施肥量推荐.结果表明:各施肥处理产量均高于无肥处理,缺素处理对香水菠萝产量的影响为氮>钾>磷;N2P2K2处理的产量和净收益最高,分别为50350 kg/hm2和16750...

Effect of NPK Fertilization on Yield and Fertilization Recommendation for ‘Tainong No. 11’ Pineapple

A field experiment using the ‘3414’ design was conducted for Tainong No.11 pineapple in Hainan. The effects of different NPK formula fertilization treatments on yield and economic performance were studied, and further the optimized NPK fertilization recommendation for good yield was discussed. Results showed compared with the no fertilization treatment, different NPK formula fertilization treatment increased the yield of Tainong No.11 pineapple, and the reduction of nutrient deficiency on yield was in the order of N>K>P. Treatment N ₂P₂K₂ had the highest yield and net economic benefit, 50 350 kg/hm² and 167 508 yuan/hm², respectively. The regression analysis results indicated an atypical ternary quadratic fertilizer effect model existing between NPK fertilization rates and yields, but binary quadratic function and unary quadratic function failed to give suitable regression. Using the yield frequency analysis method, the fertilization recommendation was 317~422 kg/hm² for N, 66~92 kg/hm² for P₂O₅, 271~396 kg/hm² for K₂O, respectively, which could gurantee the yield in the range of 30870~50350 kg/hm² with 95% probability, and the ratio of NPK fertilization recommendation was 1 : 0.16~0.29 : 0.64~1.25.