【摘要】 采用氟、磷、钾化肥三因素通用旋转组合设计，通过计算机模拟寻优，建立了湘南砂岩红壤玉米－大豆立体栽培模式中玉米施肥量－产量、玉米施肥量－利润数学模型；优选出玉米产量和利润最高的各10套施肥方案；计算出玉米最高产量的施肥量为：尿素750kg／hm2，过磷酸钙1125kg／hm2，氯化钾332kg／hm2，N∶P2O5∶K2O＝1∶0.39∶0.58；计算出玉米最佳经济效益施肥量为：尿素712.8kg／hm2，过磷酸钙1125kg／hm2，氯化钾285.2kg／hm2，N∶P2O5∶K2O＝1∶0.41∶0.52．玉米与大豆的产量间以及两者的利润间均呈极显著正相关．更多还原

【Abstract】 Mathematical models of recommended fertilization of nitrogen, phosphorus and potassium for corn in com-soybean stereo-cultivation were set up by means of universal rotational combinatorial design and computer tcchnology. 10fertilization schemes bringing maxium production of corn and profit were selected separately. The fertilization amounts for maxium production are 50 kg/hm2 of urea, 1125 kg/hm2 of superphosphate and 332 kg/hm2 of potassium chloride, and N: P2O5 : K2O=1:0.39: 0.58. The fertilization amounts for maxium profit from corn production are 712.8 kg/hm2 of urea, 1125 kg/hm2 of superphosphate and 285.2 kg/hm2 of potassium chloride, and N: P2O5. K2O =1:0.41:0.52. The productions of corn and soybean are prositively relative, and so are the profits from them.更多还原