Central Coffee Research Institute, Coffee Research Station, Chikmagalur, India.
Water Management Division, Centre for Water Resources Development and Management (CWRDM), Kozhikode, India.
J Sci Food Agric. 2021 Apr;101(6):2273-2283. doi: 10.1002/jsfa.10848. Epub 2020 Oct 17.
Humic acid is a promising natural resource to be utilized as an alternative for increasing soil fertility and crop production. A field experiment was conducted on the loamy sand soil at the Central Coffee Research Institute research farm, Karnataka, India for 2 years to evaluate the influence of humic acid on yield and bean quality of coffee with six treatments. The treatments comprised of recommended dose of fertilizer (RDF), humic acid soil application and foliar spray along with nutrient mixture and growth hormones.
The data of the yield attributes of coffee revealed that the highest total nodes per branch, crop nodes per branch, flower buds, total number of fruits per branch and fruit set percentage of 17.45, 9.4, 208.65, 153.31 and 3.28, respectively, were recorded by T , which consists of RDF + humic acid granules at 10 kg acre + nutrient mixture spray (1 kg urea, 1 kg SSP, 0.75 kg MOP, 1 kg ZnSO + 75 mL Planofix 200 L + humic acid at 600 mL 200 L as foliar application 25 days after blossom) during the both years of study. Humic acid application significantly improved the yield in both seasons of research. The same trend was observed in coffee bean quality and tree nutrients status. Postharvest nutrient status in the soil did not show any significance.
The study emphasized that application of humic acid as soil and foliar application improves the yield attributes, yield and quality of coffee apart from the economic profitability. © 2020 Society of Chemical Industry.
腐植酸是一种很有前途的自然资源，可以作为提高土壤肥力和作物产量的替代物。在印度卡纳塔克邦中央咖啡研究所的农场进行了一项为期 2 年的壤土砂土地域试验，以评估腐植酸对咖啡产量和豆质的影响，共有 6 种处理方式。这些处理方式包括推荐施肥量（RDF）、腐植酸土壤施用和叶面喷施，以及营养混合物和生长激素。
咖啡产量性状的数据显示，每个枝条的总节点数、每枝条结果节点数、花蕾数、每枝条的总果实数和结实率最高，分别为 17.45、9.4、208.65、153.31 和 3.28，这是由 T 处理记录的，该处理由 RDF+腐植酸颗粒（10 公斤/英亩）+营养混合物喷雾（1 公斤尿素、1 公斤 SSP、0.75 公斤 MOP、1 公斤 ZnSO+75 毫升 Planofix 200 升+腐植酸 200 升，在开花后 25 天进行叶面喷施）组成，在两年的研究中均有记录。腐植酸的施用显著提高了两个研究季节的产量。在咖啡豆的质量和树木养分状况方面也观察到了相同的趋势。收获后土壤中的养分状况没有显示出任何意义。
该研究强调，腐植酸的土壤和叶面施用不仅提高了咖啡的产量和品质，还提高了其经济效益。© 2020 化学工业协会。
