腐植酸保水缓释肥对紫花苜蓿生长和肥料利用率的影响  

Effects of Humic Acid Water Retaining and Slowly-release Fertilizer on Growth and Fertilizer Utilization Rate of Alfalfa

作　　者：钟禄威 栗丽[1] 杨立帆 刘洋[1] 王曰鑫[1] Zhong Luwei;Li Li;Yang Lifan;Liu Yang;Wang Yuexin(College of Resources and Environment,Shanxi Agricultural University,Taigu,030801)

机构地区：[1]山西农业大学资源环境学院,太谷030801

出　　处：《腐植酸》2022年第4期36-41,共6页Humic Acid

摘　　要：通过盆栽试验,研究了腐植酸保水缓释肥对土壤养分、紫花苜蓿生长及肥料利用率的影响。结果表明:施用腐植酸保水缓释肥能增加土壤养分含量和水分含量,改善土壤团粒结构,提高紫花苜蓿产量,促进紫花苜蓿植株对氮、磷、钾养分的吸收和利用。与等量掺混肥相比,施用腐植酸保水缓释肥土壤含水量、有机质和碱解氮含量分别提高了20.83%~47.22%、42.49%~46.09%和25.03%~62.36%;紫花苜蓿产量增加了12.04%~37.86%;氮、磷、钾肥利用率提高了0.89~2.74倍、0.48~1.83倍、0.89~2.16倍,肥料贡献率提高了1.13~1.40倍。以腐植酸保水缓释肥施用量为总养分(N∶P_(2)O_(5)∶K_(2)O=3.3∶1∶1)3克/盆效果最佳。The effects of humic acid water retaining and slowly-release fertilizer on soil nutrients,alfalfa growth and fertilizer utilization rate were studied by pot experiment.The results showed that the application of humic acid water retaining and slowly-release fertilizer could increase soil nutrient and water content,alfalfa yield,improve soil aggregate structure.It could promote the absorption and utilization of nitrogen,phosphorus and potassium by alfalfa plants.Compared with the same amount of bulk blending fertilizer,the water content,organic matter and alkali-hydrolyzable nitrogen content increased by 20.83%~47.22%,42.49%~46.09%and 25.03%~62.36%respectively.Alfalfa yield increased by 12.04%~37.86%.The fertilizer utilization rate of nitrogen,phosphorus and potassium increased by 0.89~2.74 times,0.48~1.83 times,0.89~2.16 times,and the fertilizer contribution rate increased by 1.13~1.40 times.The recommended optimum application amount of humic acid water retaining and slowly-release fertilizer was 3 g/pot of total nutrient(N∶P_(2)O_(5)∶K_(2)O=3.3∶1∶1).

关 键 词：腐植酸 保水剂 掺混肥 紫花苜蓿 肥料利用率 

分 类 号：TQ444.6[化学工程—化学肥料工业] S551.7[农业科学—作物学]