云南金沙江干热河谷油橄榄不同材料覆盖后土壤养分的变化

Effects of Mulching on Soil Nutrients of Olive Orchard in Dry and Hot Jinsha River Valley in Yunnan

在云南省金沙江干热河谷的油橄榄园进行了4种不同材料的覆盖试验,分析不同材料覆盖后,土壤有机质、氮、磷、钾含量的变化。结果表明,覆盖处理提高了油橄榄园土壤中有机质的含量,土壤全氮、全磷、全钾含量变化不大,速效养分增加明显。与对照(空白)相比,秸秆覆盖的效果最明显,使有机质、速效氮、速效磷、速效钾的含量分别增加66.85%、62.67%、近20倍和83.68%。

Mulching experiments were carried out in olive orchards in dry and hot Jinsha valley in yu nan province. Four different mulching materials were used, and changes in soil organic matter, N, P and K were analyzed following mulching. Results showed that mulching increased soil organic matter content but did not significantly change soil total N, total P and total K content. Increase in available nutrients was significant after mulching. Straw was the best among the 4 mulching materials because mulching with it increased soil organic matter, available N, available P and available K by 66.85%,62.67%,20 times and 83. 68%, respectively, when compared with control.