腐殖酸类营养型改良剂改善火龙果果园土壤理化特性和幼茎养分含量

采用随机区组试验,比较不同施用量腐殖酸类营养型改良剂（2906、4100、5415 kg/hm ²）下火龙果果园土壤理化性状和幼茎养分含量的差异,为火龙果果园的土壤肥力管理提供理论指导。结果表明：虽然腐殖酸类营养型改良剂中化肥用量仅为对照的13.40%、18.90%和24.96%,但改良剂的施用未降低土壤全氮、全磷、全钾和碱解氮、速效磷和速效钾含量,且改良剂施用量为5415 kg/hm ²的处理显著提升了肥沟内土壤速效钾和有机质含量。此外,改良剂的施用未降低土壤pH和火龙果幼茎养分含量。火龙果果园中可施用腐殖酸类营养型改良剂,从而减少化肥的施用量,稳定果园土壤肥力和保障火龙果生长的养分需求。

Humic Acid Nutrient Modifier Improved Soil Physicochemical Properties in Orchard and Nutrient Contents of Young Stems of Pitaya

The differences of nutrient contents of young stems and soil physicochemical properties were compared with CK after applying humic acid nutrient modifier (HANM) in 2906, 4100 and 5415 kg/hm ² by a randomized block test in order to supply a theoretical direction for soil fertility management in pitaya fruit orchards. Soil nutrient contents of total nitrogen (TN), total phosphorus (TP), total potassium (TK), soil alkali-hydrolyzable nitrogen (AN), available phosphorus (AP) and available potassium (AK) did not decrease in the treatments with 13.40%, 18.90% and 24.96% of the fertilizer amounts of the control if HANM was used. Application of HANM in 5415 kg/hm ²obviously increased the contents of AK and organic matter (OM) in dressing furrow. Application of HANM did not decrease soil pH and nutrient contents of young stems in pitaya fruit. HANM can be used in pitaya fruit orchards in order to decrease fertilizer usages, stabilize soil fertility and guarantee the nutrient demand of pitaya fruit.