不同生产模式施肥对保护地土壤肥力及作物产量的影响

Fertilization Effects on Soil Fertility and Crop Yield under Different Cultivation Patterns in Protected Fields

通过连续4年的定位试验，研究了不同生产模式施肥对保护地土壤肥力及作物产量的影响，结果表明：有机生产模式施肥，耕层土壤（0～20cm）有机质、碱解氮、速效磷、速效钾含量年均分别增加10．32g／kg，38．43mg／kg，47．68mg／kg，119．22mg／kg；无公害生产模式施肥年均增加5．93g／kg，20．05mg／kg，41．67mg／kg，45．49mg／kg；常规生产模式施肥，土壤有机质、碱解氮、速效钾年均增加2．24g／kg，1．04mg／kg，33．84mg／kg，但速效磷含量却有一定程度的减少。20～40cm土层土壤有机质、碱解氤、速效磷、速效钾含量也有不同程度的增加。另外，在试验条件下，不同生产模式施肥对产量的影响差异不显著。

The results of 4 year comparative experiments were as follows.in the soil arable layer（0 -20cm）, fertilizer application increased the contents of organic matter, alkali hydrolysable N, available phosphorus, available potassium by 10. 32g/kg, 38.43mg/kg, 47. 68mg/kg and 119.22 mg/kg,respectively in organic cultivation pattern;and increased by 5.93g/kg,20.05mg/kg,41.67 mg/kg and 45.49mg/kg, respectively under integrated cultivation pattern;the contents of organic matters,alkali-hydrolysable N and available potassium increased by 2. 24g/kg, 1.04mg/kg and 33.84mg/kg, but available phosphorus decreased by degree under normal cultivation pattern. Fer tilizer application did not significantly affect the crop yield under all patterns.