有机无机垃圾复混肥对土壤理化性质与小麦产量的影响

Effects of organic-inorganic rubbish-mixed fertilizer on the soil physical and chemical characters and wheat yield

试验研究有机无机垃圾复混肥对土壤理化性质与小麦产量的影响结果表明，与不施肥处理相比，有机无机垃圾复混肥处理0～20cm土层土壤容重降低0．04g／cm^3，总孔隙度增加1．51％，〉0．25mm团粒结构增加5．10％，自然含水量增加71．68g／kg，贮水量增加153．50m^3／hm^2阳离子交换量增加7．03cmol／kg，土壤有机质、碱解氮、速效磷、速效钾分别增加1．77g／kg、20．51mg／kg、2．95mg／kg、11．10mg／kg，pH值降低0．07。小麦穗数、穗粒数、千粒重、产量分别增加17万穗／hm^2、8．73粒、7．24g、1．53t／hm^3，增产率达31．23％。并对土壤重金属Hg、Cd、Cr、Pb富集有明显减缓趋势，且经LSR检验不同处理间差异显著性达显著和极显著水平。

The effects of organic-inorganic rubbish-mixed fertilizer on the soil physical and chemical characters, and wheat yield were studied. The results show that compared with the treatment without fertilizers, the bulk density of organic-inorganic rubbish-mixed fertilizer treatment in 0- 20 cm soil layer decreases 0.04 g/cm^3, the total porosity increases by 1.51% ,the granule structure of 〉 0.25 mm increase by 5.10 %, the natural water content increases 71.68 g/kg, the store water increases 153.50 m^3/hm^2 ,the cation exchange capacity increases 7.03 cmol/kg,the soil organic matter and alkali- hydrolysis N, available P and available K increase 1.77 g/kg, 20.51 mg/kg, 2.95 mg/kg and 11.10 mg/kg, the pH value reduces 0.07. The wheat ear and grain number, 1000-grain weight and output of wheat increase 170 thousands/hm^2, 8.73,7.24 g and 1.53 t/hm^2 ,the rate of increasing yield reaches 31.23% .And in soil,the element Hg, CA, Cr and Pb enrichment of heavy metal have slow down tendency obviously. Between different treatments, the difference reaches significant and very significant level by LSR inspection.