不同来源的硝基腐殖酸在盆栽上海青上的应用效果

The Application Effect of Nitro Humic Acid from Different Sources on Potted Brassica chinensis

为考察不同来源的硝基腐殖酸作为生物刺激素对农作物生长、品质及土壤理化性状的影响,以上海青为试验对象,以粉碎后的风化煤(CKⅠ)和褐煤(CKⅡ)作为对照,开展了盆栽底施试验。结果表明:硝基腐殖酸2号(产地内蒙古)和硝基腐殖酸4号(产地新疆)的综合表现较好,对上海青株高和叶片叶绿素相对含量(SPAD值)均有促进作用,单株地上部鲜质量分别较CKⅠ和CKⅡ处理提升了3.40%、2.29%和9.77%、8.60%;不同来源的硝基腐殖酸处理的上海青叶片中维生素C含量较CKⅠ处理的提高5.99%~44.44%,硝酸盐含量较CKⅡ处理的降低了0.13%~11.81%;与CKⅠ和CKⅡ处理相比,施用适量的硝基腐殖酸能提高土壤中有机质和硝态氮含量,活化土壤中钾素和磷素。施用不同来源的硝基腐殖酸既可促进上海青生长,增加生物量,提升品质,又可改善土壤理化性状。

In order to investigate the effects of different sources of nitro humic acid as biostimulants on crop growth,quality and soil physical and chemical properties,a basal application pot experiment is carried out with Brassica chinensis L.,and crushed weathered coal(CKⅠ)and lignite(CKⅡ)are used as controls.The results show that nitro humic acid No.2(origin Inner Mongolia)and nitro humic acid No.4(origin Xinjiang)have a better comprehensive performance.The plant height and leaf relative chlorophyll content(SPAD value)of Brassica chinensis L.are promoted.The aboveground fresh weight of single plant is elevated by 3.40%,2.29%,and 9.77%,8.60% compared with that of CKⅠand CKⅡ treatments,respectively.Compared with CKⅠtreatment,the vitamin C content in the leaves of Brassica chinensis L.treated with different sources of nitro humic acid increased by 5.99%-44.44%,and the nitrate content decreased by 0.13%-11.81%compared with that of CKⅡ treatment.Compared with CKⅠ and CKⅡ treatments,the application of appropriate amount of nitro humic acids can increase the content of organic matter and nitrate nitrogen in the soil,and activate the potassium and phosphorus in the soil.The application of nitro humic acid from different sources can both promote the growth of Brassica chinensis L.,increase biomass,enhance quality and improve soil physical and chemical properties.