黑液腐植酸肥料对棉花生长及土壤肥力的影响

通过在北疆布设的3种肥料(腐植酸液体肥料HALF-A、HALF-B、HALF-C)5个施肥水平的田间试验,研究了黑液腐植酸肥料对棉花生长及土壤肥力的影响。结果表明:(1)与常规肥料比,应用不同黑液腐植酸液体肥料,增产幅度达到8.54%~10.80%,提高单铃重0.2~0.3 g,对衣分和单株有效成铃数影响不大;(2)施用腐植酸液体肥料能够推迟棉花成熟2~4 d;(3)腐植酸液体肥料施用量2250kg/hm2以上时显著促进了棉花花后干物质的累积;(4)三种腐植酸液体肥料施用量3 000 kg/hm2时对棉花氮素养分的吸收促进作用最大,HALF-B在施用量2250 kg/hm2,HALF-C在3 000 kg/hm2时促进了棉花磷素养分的吸收,腐植酸液体肥料施用量3 750 kg/hm2以上时显著促进了棉花钾素养分的吸收;(5)施用腐植酸液体肥料对当年收获后土壤肥力影响不大。

Effect of different humic acid liquid fertilizer on cotton growth and soil fertility

In order to provide the evidence for resource utilization of black liquor,the field experiments of humic acid product from black liquor were carried out in North Xinjiang.With designing three fertilizer treatments HALF-A,HALF-B,HALF-C and five-level method,to study the effect of humic acid product on the cotton growth and soil fertility.The experiments showed that:(1) compared with the conventional solid fertilizer,humic acid liquid fertilizer could remarkably increase the cotton yield by 8.5%～10.8%,boll weight increased by 0.2～0.3 g,but lint percentage and Boll per plant was not affected.(2) Compared with the conventional solid fertilizer,humic acid liquid fertilizer could delay the harvest time by 2～4 day.(3) Compared with the conventional solid fertilizer,2 250 kg/hm2 humic acid liquid fertilizer could evidently promote dry matter accumulation amount of after flower period.(4) compared with the conventional solid fertilizer,three humic acid liquid fertilizer promote nitrogen uptake by application amount about 3 000 kg/hm2,meanwhile,2 250 kg/hm2 HALF-B and 3 000 kg/hm2 HALF-C can increase phosphorus uptake,3 750 kg/hm2 of this three humic acid liquid fertilizer can increase Potassium uptake.(5) the cotton experiment results supported that humic acid product from black liquor could not evidently increase soil fertility by one year experiments.