【摘要】 采用田间小区试验研究了莲藕磷肥合理用量,试验结果表明,在理论产量基本相等的条件下,采用线性+平台模型得到的莲藕临界施磷量(P2O568.8～106.9 kg/hm2),大大低于用二次型模型得到的莲藕最佳经济施磷量(P2O5117.6～144.0 kg/hm2),根据湖北莲藕生产和施肥现状以及藕田土壤磷素肥力水平,提出湖北莲藕磷肥(P2O5)合理用量为75.0～120.0 kg/hm2,平均为90.0 kg/hm2。更多还原

【Abstract】 Rational phosphorus fertilizer application dose on rhizome lotus was studied by field experiments.The results showed that under the condition on nearly equal theoretical rhizome lotus yield,the critical value of P2O5 application dose determined by linear + plateau model(68.8～106.9 kg/hm2) was greatly lower than the optimum economic P2O5 application dose determined by quadratic model(117.6～144.0 kg/hm2).According to the present status of rhizome lotus production,and taking fertilization of farmer practice and lotus field soil P fertility into consideration,rational P2O5 application dose on rhizome lotus in Hubei province was suggested to be 75.0～120.0 kg/hm2 with an average of 90.0 kg/hm2.更多还原