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通过1986～1990年间80多个田间小麦肥效试验,研究了石家庄地区小麦生产进入高产阶段后不同肥力土壤上小麦肥效曲线方程、高产经济施肥指标。结果表明,不同肥力麦田的小麦高产经济施肥指标为:高肥力麦田亩施N11.1～13.8kg,P_2O_510.7～13.9kg,中肥力麦田亩施N12.6～15.2kg,P_2O_59.8～12.1kg;低肥力麦田亩施N13.3～15.5kg,P_2O_59.1～11.7kg。还研究了小麦目标产量施肥法所需的三个施肥参数:(1)小麦百公斤产量养分吸收量,空白区平均为:N2.32kg,P_2O_51.05kg,K_2O2.72kg;施肥区平均为:N2.82kg,P_2_51.03kg,K_2O_3.15kg。(2)土壤速效磷和碱解氮的校正系数(C_P、C_N)分别为:C_P=0.41+4.01/P,C_N=0.28+0.035P。(3)氮、磷肥利用率(Z_N、Z_P)分别为:Z_N(％)=42.1-0.35P,Z_P(％)=27.6-1.20P(P为土壤速效磷含量)。
Through the experiment of more than 80 wheat experiments in the field from 1986 to 1990, this paper studied the equation of wheat fertilizer efficiency on different fertility soils after entering the high-yielding stage of wheat production in Shijiazhuang and the high-yield economic fertilization index. The results showed that the indexes of high yield and economic fertility of wheat in different fertility wheat fields were: N11.1 ~ 13.8kg, P_2O ~ 510.7 ~ 13.9kg, N12.6 ~ 15.2kg, P_2O_59.8 ~ 12.1 kg; low fertility wheat fields Mushi N13.3 ~ 15.5kg, P_2O_59.1 ~ 11.7kg. The three fertilization parameters needed by the wheat yield fertilization method were also studied: (1) The yield of wheat in one kilogram of yield absorbed, the average of blank area was: N2.32kg, P_2O_51.05kg, K_2O2.72kg; the average fertilization area was N2 .82kg, P_2_51.03kg, K_2O_3.15kg. (2) Correction coefficients (C_P, C_N) of soil available P and available N are respectively C_P = 0.41 + 4.01 / P and C_N = 0.28 + 0.035P. (3) Nitrogen and phosphorus use efficiency (Z_N, Z_P) were: Z_N (%) = 42.1-0.35P, Z_P (%) = 27.6-1.20P (P is the soil available phosphorus content).