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Soil boron fertilization: The role of nutrient sources and rootstocks in citrus production

机译:土壤硼肥:柑橘中养分来源和砧木的作用

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摘要

Boron (B) is a key element for citrus production, especially in tropical regions, where the nutrient availability is commonly low in the soil. In addition, information about doses, fertilizer sources, methods of application, and particularly, differential nutrient demand of scion/rootstock combinations are required for efficient fertilization of commercial groves. In a non-irrigated sweet orange orchard (cv. Natal), grafted onto Rangpur lime, Swingle citrumelo or Sunki mandarin, we studied the application of two sources of B: boric acid (17% B, soluble in water) and ulexite (12% B, partially soluble in water) at four levels of supply (control without B, and soil application of 2, 4 and 6 kg ha–1 yr–1 of B). The experiment was carried out for three years (2004-2006). Boron availability in the soil and concentration in the leaves, as well as the fruit yield and quality of trees were evaluated. Soil B extracted with hot water and total leaf B positively correlated with doses of the nutrient applied to the trees. Levels of B in the soil and in the leaves did not vary with fertilizer sources. Fruit yield of trees grafted onto Rangpur lime and Swingle citrumelo was more responsive to B doses than those grafted onto Sunki mandarin. The maximum fruit yield of trees grafted onto Swingle was obtained with 3.2 kg ha–1 yr–1 of B, and leaf B level of 280 mg kg–1 that point out to a highest demand for B when this combination was compared with other rootstocks. Furthermore, fertilization with B did not affect the quality of fruits, but correlated with B and potassium (K) concentrations in the leaves. These results also support that the current recommendations for levels of B in leaves should be revisited.
机译:硼(B)是柑橘生产的关键元素,尤其是在热带地区,那里的土壤养分利用率通常很低。另外,为了有效地施肥商业林地,需要有关剂量,肥料来源,施用方法,尤其是接穗/砧木组合的不同养分需求的信息。在未灌溉的甜橙果园(纳塔尔产)中,将其嫁接到Rangpur石灰,Swingle citrumelo或Sunki橘子上,我们研究了B的两种来源的应用:硼酸(17%B,溶于水)和无钠膨润土(12) %B,部分溶于水)在四个供应水平下(无B的对照,土壤施用2、4和6 kg ha–1 yr-1的B)。实验进行了三年(2004-2006)。评价了土壤中硼的有效性和叶片中的浓度,以及水果的产量和树木的质量。用热水和土壤总叶B提取的土壤B与施于树木的养分剂量呈正相关。土壤和叶片中的B含量不随肥料来源而变化。 B剂量嫁接在Rangpur石灰和Swingle citrumelo上的树木的果实产量比Sunki普通话嫁接的树木的果实产量对B剂量的响应更大。用3.2 kg ha–1 yr-1的B可获得嫁接在Swingle上的树木的最大果实产量,叶片B的水平为280 mg kg-1,这表明与其他砧木相比,对B的需求最高。此外,用B施肥不会影响果实的品质,但与叶片中的B和钾(K)浓度相关。这些结果也支持应重新考虑目前有关叶片中B含量的建议。

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  • 来源
    《农业科学学报(英文版)》 |2017年第7期|1609-1616|共8页
  • 作者单位

    Centro de Citricultura Sylvio Moreira, Instituto Agron?mico, Cordeirópolis (SP) 13490-970, Brazil;

    Centro de Citricultura Sylvio Moreira, Instituto Agron?mico, Cordeirópolis (SP) 13490-970, Brazil;

    Centro de Citricultura Sylvio Moreira, Instituto Agron?mico, Cordeirópolis (SP) 13490-970, Brazil;

    Esta??o Experimental de Citricultura de Bebedouro, Bebedouro (SP) 14700-970, Brazil;

    Centro de Solos e Recursos Ambientais, Instituto Agron?mico/Bar?o de Itapura, Campinas (SP) 13020-902, Brazil;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-18 00:24:03
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