砂姜黑土长期定位培肥技术研究

Effect of Long-term Trial on Raising Fertility of Shajiang Black Soil

根据20年定位试验资料,阐述了有机肥与化肥配施、单施有机肥、单施化肥及不施肥等五种施肥方式对作物产量和土壤肥力的影响。两季作物的总产量以有机肥与化肥配施处理最高,较单施有机肥和单施化肥分别增产18.4%～36.1%和7.4%～23.4%。有机肥与化肥配合,能显著增加土壤有机质、全氮、全磷、有效氮、磷的含量。每kg氮素增产粮食数也以等量的有机肥与化肥配施的处理最多。有机肥加化肥是砂姜黑土培肥改良较理想的施肥方式,但同时必须重视钾肥的施用。

Effects of combined application of organic manure and chemical fertilizers(MNP),organic manure(M),and single chemical fertilizers(NP) on crop yields, soil fertility and nutrient balance were studied systematically by 20year's field experiment. The results show that the total yield of MNP was highest being 186 to 360% and 76 to 234%. The soil organic matter, total N, total P, available N and available P contents increased with combined application of organic manure and chemical fertilizers. Therefore, the application of chemical fertilizers combinaed with organic manure would be an efficient way for improving fertility of shajiang black soil.