Bio:
Email: 987429690@qq.com
胡泽彬(1990—),男,硕士,助理农艺师,主要从事农田土壤肥料研究;987429690@qq.com
选取T、H、F等3种不同类型的腐殖酸改良剂,施用量分别设置为200、400 kg/亩(1亩=667 m2),以不施用腐殖酸改良剂的处理为对照(CK),开展了田间小区试验,通过测定棉花出苗率、农艺性状、产量性状以及棉花种植前后土壤理化性状等指标,考察了不同腐殖酸改良剂对盐渍化土壤的改良效果及对棉花生长的影响。结果表明:与CK处理相比,T型腐殖酸改良剂在施用量为400 kg/亩时,棉花出苗率、株高、主茎叶片数、叶面积、籽棉产量分别提高32.0%、17.7%、18.5%、27.0%、43.5%;3种腐殖酸改良剂能有效降低土壤pH以及总盐含量,显著提升土壤中有机质、碱解氮、速效钾、Mg2+和Ca2+的含量,降低Na+、Cl-的含量,土壤中有机质、碱解氮、有效磷和速效钾含量随腐殖酸改良剂用量的增加而增加。3种腐殖酸改良剂均能促进棉花生长,改良盐碱土壤,其中T型腐殖酸改良剂的效果最佳。
To evaluate the effects of three types of humic acid amendments (T, H, F) on saline-alkali soils and cotton growth, a field plot experiment is conducted with application rates of 200 and 400 kg/mu (1 mu=667 m2), using a control treatment without humic acid amendments (CK). Cotton emergence rate, agronomic traits, yield characteristics, and soil physicochemical properties before and after cultivation are measured. The results show that compared with CK, the T-type humic acid amendment at 400 kg/mu increases cotton emergence rate, plant height, main stem leaf number, leaf area, and seed cotton yield by 32.0%, 17.7%, 18.5%, 27.0%, and 43.5%, respectively. All three amendments effectively reduced soil pH and total salt content, while significantly enhancing soil organic matter, alkali-hydrolyzable nitrogen, available potassium, Mg2+, and Ca2+ contents, and decreasing Na+ and Cl- levels. Soil organic matter, alkali-hydrolyzable nitrogen, available phosphorus, and available potassium contents increased with higher amendment application rates. All three amendments improved cotton growth and ameliorated saline-alkali soils, with the T-type exhibiting the most pronounced effects.