内蒙古扎鲁特旗春玉米推荐施肥指标体系研究

2007-2009年在扎鲁特旗分进行了春玉米＂3414＂肥料肥效试验.结果表明：扎鲁特旗春玉米N、P2O5、K2O的农学效率平均分别为10.6kg、9.9 kg、6.7 kg,增产作用依次为：氮肥、磷肥、钾肥,随着土壤肥力水平的降低,施肥增产率升高,但单位养分增产量下降.扎鲁特旗春玉米的土壤养分丰缺指标为：全氮、极低（〈1.11g/kg）、低（1.11～1.39 g/kg）、中（1.39～1.94 g/kg）、高（1.94～2.17 g/kg）、极高（〉2.17 g/kg）;有效磷、极低（〈3.5mg/kg）、低（3.5～7.3mg/kg）、中（7.3～22.0 mg/kg）、高（22.0～31.9 mg/kg）、极高（〉31.9 mg/kg）;速效钾、极低（〈48 mg/kg）、低（48～70 mg/kg）、中（70～122 mg/kg）、高（122～147 mg/kg）、极高（〉147 mg/kg.）扎鲁特旗春玉米施肥模型为：F（N）=-17.702LnS（N）＋18.109,F（P2O5）=-4.775LnS（P）＋15.044,F（K2O）=-3.5521LnS（K）＋19.41.说明农学效率、施肥肥效、养分丰缺指标、施肥模型均为推荐施肥的重要依据.

Study on Index System of Optimal Fertilizer Treament on Spring Corn in Zhalute Banner

40 experiments with＂3414＂fertiliz effect design on spring corn were c based on high,midle and low soil fertility from 2007 to 2009 in Zhalute County.Result：The results showed that agronomy efficiency of N,P2O5 and K2O on spring corn was 10.6kg,9.9 kg and 6.7 kg respectively with the role of yield increasing effect of NP2O5K2O.The rate of yeild increasing by fertilizers increased with the declining of soil fertility,while yeild increasing per unit nutrient decreased.The indices of abundance and deficiency of soil nutrients in in Zhalute County were showed as follow：total N with five levels of lower（1.11g/kg,） low（1.11～1.39 g/kg,） moderate（1.39～1.94 g/kg,） high（1.94～2.17 g/kg）、higher（2.17 g/kg）;Olsen-P with five levels of lower（ 3.5 mg/kg,） low（3.5～7.3 mg/kg,） moderate（7.3～22.0 mg/kg,） high（22.0～31.9 mg/kg,） higher（31.9 mg/kg）;Solubale K with fiver levels of lower（48 mg/kg,） low（48～70 mg/kg,） moderate（70～122 mg/kg,） high（122～ 147 mg/kg,） higher（147 mg/kg.）The fertilization model of spring corn in Zhalute County was F（N）=-17.702LnS（N）＋18.109,F（P2O5）=-4.775LnS（P）＋15.044,F（K2O）=-3.5521LnS（K）＋19.41.Agronomy efficiency,fertilizer effect,abundance and deficiency indices of soil nutrients and fertilization model were important basis of optimal fertilizer treatment.