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本试验在于探讨沂沭河冲积淤土的氮肥效应,根据不同氮处理与小麦有关生理效应及产量之间的关系,确立小麦栽培生理和供氮的指标.材料与方法供试土壤为沂沭河冲积淤土,土层0～25厘米,质地中壤,pH7.4.1981～1982与1982～1983两个年度内,有机质分别为1.32%,1.37%;全氮为0.097%,0.07%;速效氮为1.10,1.01毫克/100克土;速效磷为5.3,8.9ppm;速效钾均为131ppm;碳酸钙均为0.15%.随机区组排列,重复四次.小
This experiment is to explore the effect of nitrogen fertilizer on alluvial silt in Yishu River and establish the index of physiological and nitrogen supply for wheat cultivation according to the relationship between physiological effects and yield related to different nitrogen treatments.Materials and Methods Soil for the trial is Yishu River Alluvial silts, soil 0 to 25 cm, soil texture, pH7.4.1981 ~ 1982 and 1982 ~ 1983 two years, the organic matter were 1.32%, 1.37%; total nitrogen was 0.097%, 0.07%; available nitrogen was 1.10 , 1.01 mg / 100 g soil; available phosphorus was 5.3,8.9 ppm; available potassium was 131 ppm; calcium carbonate was 0.15%. Randomized block arrangement, repeated four times.