目的探讨不同氮磷钾配比施肥处理对白芨产量和多糖的影响。方法通过大田试验,采用不同氮（N）、磷（P₂ O₅）、钾（K₂O）配比施肥,考察施肥对白芨产量和多糖的影响。结果每公顷施N 180kg、P₂O₅105～157.5 kg、K₂O 45～135 kg能极显著提高白芨块茎中多糖的积累,而氮磷钾施用量过高或过低则不利于白芨多糖的积累;每公顷施N 90～180 kg、P₂O₅105～157.5 kg、K₂O 45～135 kg能明显提高白芨产量。结论在肥料3因素中,磷肥供应的多少对白芨块茎多糖的量影响最大,钾对多糖量的影响最小;氮磷钾对白芨蛋白质的量影响大小为钾素>磷素>氮素;氮肥对产量的影响最大,其次是磷肥,钾肥的供应对白芨产量的影响最小。

Objective To explore the effect of fertilizer application of nitrogen(N)，phosphorus (P₂O₅)，and potassium (K₂O) on output and polysaccharides in Bletilla striata.Methods Using field test and fertilizer application of N，P₂O₅,and K₂O,the effect on output and polysaccharides in B,striata was studied.Results The results showed that application of 180 kg N/²,105-157.5kg P₂O₅/hm²，and 45-135 kg K₂O/hmz could significantly enhance the accumulation of polysaccharides in B.striata tubers.However,too high or too low of N，P₂O₅，and K₂O fertilizer was not conducive to the accumulation of polysaccharides in B.striata tubers.The application of 90-180 kg N/hm²，105-157.5kg P₂O₅/hm²，and 45-135 kg K20/hm2 could evidently increase the output of B.striata.Conclusion Among the three fertilizers of N，P₂O₅，and K₂O，the effect of the application quantity of P₂O₅ fertilizer and K₂O fertilizer on polysaccharides in B. striata tubers is the greatest and the smallest，respectively. The effect of N，P₂O₅，and K₂O fertilizers on protein content of B. striata could decrease in the order of KZ O>P₂O₅>N.By contraries，the effect of N,P₂O₅，and K₂O fertilizer on output of B.striata could be in the order of K₂O2O₅

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[基金项目]

贵州大学人才基金项目;贵州省中药材专项“白芨规范化种植”(黔科合农字[2005]5045)