广西蔗区土壤肥力和叶片养分状况调查研究
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(长江经济带农业绿色发展研究中心/西南大学资源环境学院,重庆 400715)

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孟博(1997-),在读硕士研究生,研究方向为作物养分管理。E-mail:mengbo7@email.swu.edu.cn。

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基金项目:财政部和农业农村部;国家现代农业产业技术体系资助项目(CARS-170210)。


Investigation on soil and sugarcane leaf nutrient status in Guangxi
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(Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin,College of Resources and Environment,Southwest University,Chongqing 400715)

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    摘要:

    广西是我国第一大甘蔗产地,了解广西蔗区土壤肥力及叶片养分丰缺状况,可对广西蔗区提出针对性的施肥建议。对广西南宁、崇左、来宾、百色、柳州、河池、贵港、玉林和防城港等主要甘蔗产区进行土壤和叶片调研,各采集了110份样品进行养分测定分析。结果表明:(1)广西蔗区调研土壤pH值平均为5.21,pH值<4.5的强酸性地块占比为40.91%;土壤有机质含量平均为24.43 g/kg,低于20 g/kg的缺乏地块占比为35.46%;碱解氮、有效磷、速效钾、交换性钙和交换性镁含量平均值分别为102.70、22.79、158.45、637.98和93.33

    Abstract:

    Guangxi is the largest sugarcane production area in China. Understanding the nutrient abundance and deficiency status of soil and sugarcane leaf can provide rational nutrient management recommendations for Guangxi sugarcane production. This field survey was conducted in major sugarcane producing areas in Guangxi,including Nanning,Chongzuo,Laibin,Baise,Liuzhou,Hechi,Guigang,Yulin and Fangchenggang. 110 paired samples were taken for soil and leaf,and nutrient contents were assayed. The results were as follows:(1)The average soil pH value was 5.21,with 40.91% of the samples having a pH value below 4.5. The average soil organic matter(SOM)content was 24.43 g/kg,and 35.46% of the samples was less than 20 g/kg. The average contents of alkaline hydrolysis nitrogen(AN),available phosphorus(AP),available potassium(AK),exchangeable calcium(ECa)and exchangeable magnesium(EMg)were 102.70,22.79,158.45,637.98 and 93.33 mg/kg,respectively,with the deficiency percentage being 26.36%,30.91%,4.63%,45.46% and 41.82%,respectively.(2)The contents of leaf N,P,K,Ca and Mg were 14.80~25.50,1.30~2.50,9.90~19.70,1.30~7.50 and 0.40~2.80 g/kg,respectively; while the deficiency percentage of leaf N,P and Mg accounted for 60%,91.82% and 82.72%,and most leaf K and Ca status were abundant. The content range of leaf Fe,Mn,Cu,Zn,B were 15.90~175.80,15.20~238.10,1.00~6.70,4.90~38.80 and 1.10~27.70 mg/kg,respectively; while most leaf Fe,Mn and Cu status were abundant,and deficient leaf Zn and B accounted for 50.09% and 89.09%,respectively.(3)The soil pH value showed significantly positive correlations with soil ECa and EMg,but a significantly negative correlation with soil AN. SOM was positively correlated with content of soil AN,AK,ECa and EMg.(4)The soil pH value was positively correlated with leaf Ca content,but negatively correlated with leaf Mn content. SOM showed positive correlations with leaf P and K,but a negative correlation with leaf Mn. A significantly positive relationship existed between soil EMg and leaf Mg content. According to these results,it is recommended that nutrient management in Guangxi major sugarcane production areas should pay attention to remediation of soil acidification,reasonably apply N,P and K fertilizers,increase application of organic fertilizers,and add some Mg,Zn and B fertilizers when needed.

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孟博,周一帆,战健,杨林生,邓燕.广西蔗区土壤肥力和叶片养分状况调查研究[J].中国土壤与肥料,2022,(2):181-188.

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  • 收稿日期:2020-11-06
  • 最后修改日期:
  • 录用日期:2021-01-01
  • 在线发布日期: 2022-04-07