Relations among Valencia orange yields with soil and leaf nutrients in Northwestern Paraná, Brazil

Brazilian Archives of Biology and Technology

Jonez Fidalski²  Pedro Antonio Martins Auler²  Valdomiro Tormem¹ 

[1] ,Instituto Agronômico do ParanáParanavaí PR ,Brazil

关键词: Citrus sinensis;    foliar diagnosis;    liming;    K fertilization;    calcium;    zinc;   

DOI  :  10.1590/S1516-89132000000400006

来源: SciELO

【 摘 要 】

The Valencia orange orchards established on soils of low fertility in the Northwest region of Paraná State, Brazil, have showed symptoms of Mg deficiency and reduced fruit yields. The objective of this study was to verify the relationship between yield with soil and leaf nutrients during 1996/97 growing season. Two sites of low and high productivity were selected in seven orchards. Leaf and soil samples (fertilized rows and interrows) were collected in 1996. The results showed that the citrus yields were negatively related with soil Mg/K and Ca+Mg/K ratios in the fertilized rows, and fruit weight positively correlated with leaf Zn in the low productivity orchards. The fruit weight was positively related with leaf Ca and soil Ca in the fertilized rows of the high productivity orchards. The results suggested an adequate lime and K fertilization managements in the fertilized rows, as well as an adequate Zn supply.

【 授权许可】

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