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园艺学报 ›› 2020, Vol. 47 ›› Issue (10): 1905-1916.doi: 10.16420/j.issn.0513-353x.2020-0118

• 研究论文 • 上一篇    下一篇

南丰蜜橘果园生草栽培对土壤团聚体和有机碳特征及果实品质的影响

付学琴1,*,杨星鹏1,陈登云2,甘燕云3,黄文新4   

  1. 1江西师范大学生命科学学院,南昌 330022;2江西省高安市农业农村局,江西高安 330800;3新余市农业农村局,江西新余 338000;4江西省农业农村厅,南昌 330046
  • 出版日期:2020-10-25 发布日期:2020-11-10
  • 基金资助:
    国家自然科学基金项目(31760547);江西省科技重点研发项目(20181BBF6003);江西省教育厅科技研究项目(2018)

Effects of Sod Culture on Soil Aggregates,Organic Carbon Characteristic and Fruit Quality of Nanfeng Tangerine Orchard

FU Xueqin1,*,YANG Xingpeng1,CHEN Dengyun2,GAN Yanyun3,and HUANG Wenxin4   

  1. 1College of Life Sciences,Jiangxi Normal University,Nanchang 330022,China;2Gao’an Agricultural Bureau,Gao’an,Jiangxi 330800,China;3Xinyu Agriculture Bureau,Xinyu,Jiangxi 330046,China;4Jiangxi Agriculture Department,Nanchang 330046,China
  • Online:2020-10-25 Published:2020-11-10

摘要: 以‘南丰蜜橘’果园土壤为对象,分析行间播种白三叶草(Trifolium repens)、黑麦草(Lolium multiflorum)和清耕条件下土壤机械稳定性团聚体和水稳性团聚体组成、团聚体稳定性、团聚体有机碳含量及其贡献率的差异。结果表明:生草后土壤机械稳定性团聚体以 > 5 mm粒级团聚体居多(占比28.52% ~ 35.14%),而清耕对照处理以 < 0.25 mm粒级团聚体居多(35.51% ~ 36.86%);水稳性团聚体各处理均以 < 0.25 mm粒级团聚体为多(55.71% ~ 80.47%);大团聚体比重R0.25总体为黑麦草 > 白三叶草 > 对照。在0 ~ 10 和10 ~ 20 cm土层中,白三叶草处理机械稳定性团聚体和水稳性团聚体平均质量直径(MWD)较对照分别提高了126.03%、106.8%和57.69%、31.25%,团聚体破坏率(PAD)分别降低了13.29%和12.41%;黑麦草处理机械稳定性团聚体和水稳性团聚体平均质量直径(MWD)分别提高了140.41%、125.17%和82.69%、64.58%,PAD分别降低了12.85%和16.61%,表明生草处理有利于大团聚体的形成,改善土壤结构的稳定性,且禾本科类牧草黑麦草处理明显优于豆科类牧草白三叶草处理。生草处理较大幅度提高了0 ~ 10 cm表层土层水稳性团聚体中总有机碳和各粒级团聚体有机碳含量,且白三叶草处理明显优于黑麦草处理。相关性分析表明,团聚体MWD和GMD与1 ~ 5 mm粒级团聚体有机碳含量之间均呈现显著正相关,PAD与各粒级团聚体有机碳含量之间均呈现出负相关。生草处理能明显提高‘南丰蜜橘’果实可溶性糖、可溶性固形物和维生素C含量,降低可滴定酸含量,改善果实鲜食品质,且白三叶草处理明显优于黑麦草处理。

关键词: 柑橘, 果园, 生草栽培, 土壤, 团聚体, 有机碳, 果实品质

Abstract: The mechanical stable aggregates,water-stable aggregates,aggregate stability and the organic carbon content of aggregates in Nanfeng tangerine orchards intercroppig Trifolium repens and Lolium multtiflorum were investigated. The results showed that the mechanical stable aggregates(> 5 mm)occupied 28.52%–35.14% in sod culture Nanfeng tangerine orchards,while the aggregates(< 0.25 mm)were 35.51%–36.86% in clear tillage tangerine orchards. The water-stable aggregates(< 0.25 mm)were the dominant and accounted for 55.71%–80.47% in all treatments. The overall change trend of aggregate R0.25 was Lolium multtiflorum treatment > Trifolium repens treatment > control. At the 0–10 cm and 10–20 cm soil layers in tangerine-white clover intercropping system,the mean weight diameter(MWD)of mechanical stable aggregates and water-stable aggregates increased by 126.03%,106.8% and 57.69%,31.25% and the polyagglomerate destruction rate(PAD)reduced by 13.29% and 12.41% compared with the control respectively. Simultaneously,MWD of mechanical stable aggregates and water-stable aggregates increased by 140.41%,125.17% and 82.69%,64.58% and PAD decreased by 12.85% and 16.61% in tangerine-Lolium multtiflorum intercropping system compared with the control,respectively. It showed that sod culture contributed to the formation of large aggregates and improved the soil structure stability and quality. And the improvement effect on the soil by intercropping Lolium multtiflorum was better than that by intercropping Trifolium repens. The sod culture greatly increased the total organic carbon content of water-stable aggregates and organic carbon content in different aggregate size classes at the 0–10 cm top soil,and the influence of Trifolium repens cultivation was superior than that of Lolium multtiflorum cultivation. Correlation analysis showed that the MWD and GMD was positively related to the organic carbon content of particle size aggregate(1–5 mm)and PAD was on the contrary. Naturally grown grass could increase the soluble sugar,soluble solids and vitamin C content,reduce the titratable acid content and improve the fresh food quality of Nanfeng mandarin fruit. And Trifolium repens had better improvement effect on fruit quality than Lolium multtiflorum.

Key words: citrus, orchard, sod culture, soil, aggregates, organic carbon, fruit quality

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