宁夏中部干旱带扬黄灌区甘草优化施肥模型构建初步研究

A Preliminary Study of Construction of Optimal Fertilization Model for Licorice in Yellow River Pumping Irrigation Area in Middle Arid Zone of Ningxia

甘草是宁夏中部干旱带扬黄新灌区人工栽培的主要药材。文章针对宁夏中部干旱带扬黄新灌区灰钙土土壤养分状况,以甘草药材产量为目标函数,选择单位面积施氮量、施磷量、施钾量为调控因子,采用"3414"试验方法,开展了灰钙土壤甘草优化施肥数学模型研究。研究得出,宁夏中部干旱带(盐池)扬黄新灌区灰钙土壤移栽一年生的甘草药材产量大于6 000kg/hm2的优化施肥方案为:施纯N 260.28～328.80 kg/hm2、施纯P2O5102.36～115.80 kg/hm2、施纯K2O 57.66～67.77 kg/hm2。

Licorice is the main Chinese medicinal crop artificial cultivated in the Yellow River Pumping Irrigation Area in Middle Arid Zone of Ningxia. Aiming at the soil nutrient status of the sierozem in Yellow River Pumping Irrigation Area in Middle Arid Zone of Ningxia, with the yield of licorice as target function, unit area application amount of nitrogen, phospho- rus, potassium fertilizer as regulating, factors, a study was conducted on the optimal fertilization mathematical model for licorice on the sierozem soil using the ＂3414＂ experimental method. The result showed that the optimum fertilization scheme for the transplanted licorice annual on the sierozem soil and with a yield of over 6 000 kg/hm2 in Yellow River Pumping Ir- rigation Area （Yanchi） in Middle Arid Zone of Ningxia is application of pure N 260.28 - 328.80 kg/hm2, pure P2O5 102.36 115.80 kg]hm2 and pure K20 57.66- 67.77 kg/hm2.