Objective] Effects of different orchard ages, fertilizing methods and planting patterns on soil compaction in Weibei apple orchards were studied to reveal the orchard soil compaction problems in this region.[Method] Three replicates of≤10, 11-15, 16-20, 21-25 and>25 year old orchards were selected respectively in Luochuan and Baishui of Weibei Region in Shaanxi Province.Three replicates with long-term utilization of chemical fertilizer and those with combined application of farmyard manure with chemical fertilizer were selected respec-tively.Three farmlands that had never planted apple trees before were selected.The soil compaction of 0-45 cm soil layer in this region was tested.The soil compaction differences among the apple orchards at different ages were also analyzed.[ Result] Soil compaction of Weibei or-chard soil generally changed with the increase of orchard age.In 0-30 cm soil layer, soil compaction in orchards at different ages increased dramatically with the increase of soil depth.There was only slight change of soil compaction in 30-45 cm soil layer.The difference between apple orchards and farmland in soil compaction was insignificant.The soil compaction of the apple orchards with long -term application of chemical fertilizer was significantly higher than those applying combined fertilization of chemical fertilizer and farmyard manure.[ Conclusion] Soil compaction became a serious issue among Weibei apple orchards.Combined application of chemical fertilizer and farmyard manure could markedly reduce soil compaction in 0-45 cm soil layer of Weibei apple orchards, conductive to the root’ s lengthening growth.
关键词
土壤紧实度/园龄/施肥方式/种植模式/苹果园/渭北地区
Key words
Soil compaction/Apple orchard ages/Fertilizing methods/Planting patterns/Apple orchard/Weibei Region
万方数据