垃圾复混肥对土壤理化性质及牧草产草量的影响

The effect of rubbish mixed fertilizer on soil physical and chemical feature and forage productivity

进行化肥、垃圾堆肥、垃圾复混肥对牧草田间比较试验 ,垃圾复混肥与不施肥处理比较 ,0～ 2 0cm耕层土壤容重降低 0 14 g/cm3 ,总孔度增加 5 2 7% ,>0 2 5mm的团粒结构增加 5 5 0 % ,自然含水量增加71 6 8g/kg ,贮水量增加 181 12m3 /hm2 ,阳离子交换量增加 7 0 3cmol/kg ,有机质增加 1 77g/kg ,碱解N、速效P、速效K、分别增加 2 0 5 1,2 95和 13 2 7mg/kg ,pH值降低 0 0 7。牧草单株鲜质量、干质量分别增加4 6 9 86和 15 0 35g ,鲜草和干草产量分别增加 6 5 2 0和 16 30t/hm2 。并对土壤中重金属元素Hg ,Cd ,Cr ,Pb的富集有明显减缓趋势。

The comparison experiments of chemical fertilizer, rubbish post and rubbish mixed fertilizer were carried out in this paper. The results indicated that compared with no fertilizer application, rubbish mixed fertilizer can reduced 0.14 g/cm^3 of unit weight in 0～20 cm soil, increased 5.27% porosity, 5.50% granule structure, 71.68 g/kg water content, 181.12 m^3/hm^2 water holding capacity,(7.03) cmol/kg cation exchange capacity, 1.77 g/kg organic matter. N, P and K increased 20.51 mg/kg, 2.95 mg/kg and 13.27 mg/kg, respectively. Soil pH reduced 0.07. The forage fresh and dry weight per plant increased 469.86 g and 150.35 g, respectively. Fresh and hay yield increased 65.20 t/hm^2 and 16.30 t/hm^2, respectively. The enrichment of Hg, Cd, Cr, Pb and other heavy metal slowed down.