棉花磷肥施用量与磷素养分平衡的数学模型构建  

Construction of mathematical models for phosphorus fertilizer application amount and phosphorus nutrient balance in cotton

作　　者：曹钻[1] 胡艳[1] 刘雪云 CAO Zuan;HU Yan;LIU Xue-yun(College of Intelligent Science and Engineering,Xi’an Peihua University,Xi’an 710125,China)

机构地区：[1]西安培华学院智能科学与工程学院,西安710125

出　　处：《湖北农业科学》2025年第1期39-43,共5页Hubei Agricultural Sciences

基　　金：西安培华学院校级课题(PHKT2071)。

摘　　要：为了优化棉花磷肥施用量,保证磷素养分平衡,选择Logistic模型分析棉花不同生长期的磷素积累量,之后使用指数模型和线性模型分析施磷量与土壤速效磷含量之间的关系;基于肥料效应函数法,构建了一种线性加平台数学模型,模拟磷肥施用量和棉花产量间的关系;并在此基础上通过养分平衡法确定最佳施肥量。结果表明,当磷肥施用量逐渐增加,棉花的产量也随之提高,当磷肥(P_(2)O_(5))施用量在83.99 kg/hm^(2)时,子棉产量达最高,为6 410.784 kg/hm^(2)。通过优化施肥策略,确定棉花磷素输入量为21.98 mg/kg,对应磷肥(P_(2)O_(5))施用量为82.64 kg/hm^(2),该施肥量既能保证棉花产量,也能确保磷素养分获得和支出之间的平衡。In order to optimize the application amount of phosphorus fertilizer in cotton and ensure the balance of phosphorus,the Lo-gistic model was selected to analyze the phosphorus accumulation in different growth stages of cotton,and then the exponential model and linear model were used to analyze the relationship between phosphorus application amount and soil available phosphorus content.Based on the fertilizer effect function method,a linear plus platform mathematical model was constructed to simulate the relationship between phosphorus fertilizer application amount and cotton yield.On this basis,the optimum fertilization amount was determined by the nutrient balance method.The results showed that as the application of phosphorus fertilizer gradually increased,the yield of cotton also increased accordingly.When the application amount of phosphorus fertilizer was 83.99 kg/hm^(2),the yield of seed cotton reached the highest level,which was 6410.784 kg/hm^(2).By optimizing the fertilization strategy,the phosphorus input of cotton was determined to be 21.98 mg/kg,and the corresponding phosphorus fertilizer application amount(P_(2)O_(5))was 82.64 kg/hm^(2),which could not only en-sure the cotton yield,but also ensure the balance between the acquisition and expenditure of phosphorus.

关 键 词：棉花 磷肥 施用量 磷素养分平衡 数学模型 肥料效应函数法 

分 类 号：S147.214[农业科学—肥料学] S158.2[农业科学—农业基础科学] S562