Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Malaysia.
Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.
PLoS One. 2023 Aug 29;18(8):e0285954. doi: 10.1371/journal.pone.0285954. eCollection 2023.
Foliar fertilization is a reliable technique for correcting a nutrient deficiency in plants caused by inadequate nutrient supply to the roots in acid soil. Soluble nutrients in banana pseudostem sap might be effective to supplement chemical fertilizers. However, the limited nutrients in sole banana pseudostem sap as foliar fertilization may not meet-up the nutritional demand of the crop. Field trials were, therefore, conducted with the combination of soil-applied fertilizers with foliar spray of banana pseudostem sap to increase nutrient uptake, yield, and quality of sweet corn planted in acidic soil. Three treatments viz., 100% recommended dose of fertilizers (RD) as control (T1), 75% of RD applied in soil with foliar application of non-enriched banana pseudostem sap (T2), and 50% RD applied in soil with foliar spray of enriched banana pseudostem sap (T3) were replicated four times. The combination of soil-applied fertilizer with foliar spray of enriched banana pseudostem sap (T3) showed a significant increase in leaf area index (11.3%), photosynthesis (12%), fresh cob yield (39%), and biomass of corn (29%) over control. Besides, the 50% RD of soil fertilization with foliar spray of enriched pseudostem sap increased nutrient uptake in addition to an increase in sugar content, phenolic content, soluble protein, and amino acids of corn. Considering the economic analysis, the highest net income, BCR (3.74) and MBCR (1.25) values confirmed the economic viability of T3 treatment over the T1. The results suggest that foliar spray of enriched banana pseudostem sap can be used as a supplementary source of nutrients to enhance nutrient uptake by corn while increasing yield and minimizing chemical fertilizer use in acid soil.
叶面施肥是一种可靠的技术，可以纠正由于酸性土壤中根系养分供应不足而导致的植物养分缺乏。香蕉假茎汁液中的可溶性养分可能有助于补充化肥。然而，单独使用香蕉假茎汁液作为叶面肥的养分有限，可能无法满足作物的营养需求。因此，进行了田间试验，将土壤施用肥料与香蕉假茎汁液叶面喷施相结合，以增加种植在酸性土壤中的甜玉米的养分吸收、产量和品质。三个处理，即 100%推荐施肥量（RD）作为对照（T1）、75% RD 施于土壤，同时叶面喷施非富化香蕉假茎汁液（T2）和 50% RD 施于土壤，同时叶面喷施富化香蕉假茎汁液（T3），每个处理重复四次。与对照相比，土壤施肥与富化香蕉假茎汁液叶面喷施相结合（T3）处理显著增加了叶面积指数（11.3%）、光合作用（12%）、鲜玉米穗产量（39%）和玉米生物量（29%）。此外，土壤施肥 50% RD 与富化假茎汁液叶面喷施相结合除了增加玉米的糖含量、酚含量、可溶性蛋白质和氨基酸含量外，还增加了养分吸收。考虑到经济分析，最高的净收入、BCR（3.74）和 MBCR（1.25）值证实了 T3 处理比 T1 更具经济可行性。结果表明，富化香蕉假茎汁液叶面喷施可作为玉米养分的补充来源，同时提高产量并减少酸性土壤中化肥的使用。
