| 滴灌条件下减量施钾对香蕉产量及土壤钾素平衡的影响 |
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| 引用本文： | 孔庆波,栗方亮,张青. 滴灌条件下减量施钾对香蕉产量及土壤钾素平衡的影响[J]. 植物营养与肥料学报, 2021, 27(2): 312-321. DOI: 10.11674/zwyf.20369 |
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| 作者姓名： | 孔庆波 栗方亮 张青 |
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| 作者单位： | 福建省农业科学院土壤肥料研究所，福建 福州 350013 |
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| 基金项目： | “十三·五”国家重点研发计划项目(2017YFD0202000);福建省公益专项(2018R1022-6);福建省自然科学基金项目(2019J01106)。 |
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| 摘 要： | [目的]香蕉生长快,需要及时充足的水肥供应,特别是钾素的供应.研究滴灌条件下减量施钾对香蕉产量品质、钾肥利用率、钾素平衡及经济效益等的影响,为制定适合香蕉生产的水肥一体化施肥方案提供依据.[方法]2016-2018年,在福建漳州进行了为期3年的田间定位试验.在施用等量氮磷肥的基础上,以不施钾肥(K0)和常规灌溉施钾14...
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| 关 键 词： | 香蕉 水肥一体化 减量施钾 钾肥利用率 土壤钾素平衡 |
| 收稿时间： | 2020-08-06 |
Effect of potassium fertilizer reduction on banana yield and soil potassium balance under dripping irrigation |
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| KONG Qing-bo,LI Fang-liang,ZHANG Qing. Effect of potassium fertilizer reduction on banana yield and soil potassium balance under dripping irrigation[J]. Plant Nutrition and Fertilizer Science, 2021, 27(2): 312-321. DOI: 10.11674/zwyf.20369 |
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| Authors: | KONG Qing-bo LI Fang-liang ZHANG Qing |
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| Affiliation: | Institute of Soil and Fertilizer, Fujian Academy of Agricultural Science, Fuzhou 350013, China |
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| Abstract: | 【Objectives】Banana production requires large amount of water and nutrient supply,especially K nutrition.We studied the response of banana yield,quality,efficiency and soil potassium balance to different potash input levels,to serve the integrated nutrient and water management in Fujian banana production.【Methods】A three-year fixed-site experiment was carried out from 2016 to 2018.With the same N and P input,five treatments were set up,K0(no K input)and K1(K input rate of 1400 kg/hm2)treatment were under conventional irrigation,and K0.4,K0.6 and K0.8(applying 40%,60% and 80% of K rate in K1 treatment)were under drip irrigation.At maturing stage,the banana yield,quality,K uptake and soil K balance were investigated.【Results】The 3-year average yield of K0.4,K0.6,K0.8 treatments were -11.5%,2.4% and 13.5% higher than that of K1,respectively.Compared with K1,the growth,single banana size and weight under K0.4 were significantly lower;The growth of K0.6 and K0.8 were similar to those of K1,the fruit number and single fruit size and weight under K0.6 were similar,while the fruit number and single fruit size and weight under K0.8 were significantly higher.The average three-year net income was in descent order of K0.8(54179.4 yuan/hm2)>K0.6(46663.7 yuan/hm2)>K1(42538.1 yuan/hm2)>K0.4(36808.1 yuan/hm2),and the net income differences among them were all significant.After three years of continuous plantation of banana,the soil K was apparently deficit in K0(-406.5 kg/hm2)and K0.4(-93.3 kg/hm2),basically balanced in K0.6(8.9 kg/hm2),and surplus in K0.8(220.4 kg/hm2)and heavily surplus under K1(501.9 kg/hm2).【Conclusions】Integrated considering yield,quality,economic benefits and soil potassium balance,the proper decreasing rate of potash is 20% under drip irrigation in banana orchards in Fujian Province. |
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| Keywords: | banana integration of water and fertilizer reduced application of potassium utilization rate of potassium fertilizer soil potassium balance |
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