碳酸盐黑钙土区腐植酸施用模式对芸豆生长发育及产量的影响OA

In order to facilitate high-quality and high-yield cultivation of kidney bean in carbonate chernozem regions,four kidney bean cultivars including Qiyun 1,Qiyun 2,Zhongyun 3 and Long 12-2578 were adopted as experimental materials.Four treatments were arranged,as blank control with clean water(CK),sole application of solid humic acid(G),sole foliar application of liquid humic acid(Y)and combined application of solid and liquid humic acid(GY).Phenological development,vegetative and reproductive growth traits,photosynthetic physiology and yield components were comprehensively measured to clarify the regulatory effects of varying humic acid application regimes on kidney bean performance and genotypic discrepancy.The results indicated that,humic acid application exerted no significant influence on crop phenology.During the vegetative stage,basal applied solid humic acid gradually improved soil properties,increased root dry weight,leaf chlorophyll concentration and leaf area,with its promoting effect intensified along plant development.At the reproductive stage,combined humic acid via basal soil application plus foliar spraying provided dual-path nutrient supply,synergistically boosting aboveground biomass,effective branch number and pod count per plant while accelerating translocation of assimilates toward reproductive organs.Yield improvement induced by humic acid was mainly attributed to elevated grain weight per plant rather than variations in pod length or seed number per pod.Significant cultivar × treatment interaction was detected,Qiyun 1 and Zhongyun 3 achieved 12.28％and 11.84％yield increases under combined solid-liquid humic acid application,whereas Qiyun 2 and Long 12-2578 obtained 6.94％and 7.84％yield increases with single solid humic acid amendment.