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Physical and Quality Characteristics of Jupi Pineapple Fruits on Macronutrient and Boron Deficiency

Natural Resources 2014年第8期5卷 359-366页

作者： Maria José Mota Ramos leandro glaydson da rocha pinho Federal Institute of Education Espírito Santo Campus Itapina Brazil Research Regional Center and Tecnology Transfer of EMPAER/MT Várzea Grande Brazil

The deficiencies of mineral elements, change the development of plants in a broad sense, and therefore may alter the growth and fruit quality. The objective of this work was to evaluate the influence of macronutrient and boron deficiencies on morphological characteristics of “Jupi” pineapple fruits. The treatments complete, -N, -P, -K, -Ca, -Mg, -S and -B were applied as nutrient solutions in plastic pots with 14 kg of purified beach sand and one pineapple plant as the experimental unit. The trial was set up a randomized complete blocks design with six replicate. Nitrogen deficiency reduced fruit mass with and without crown, fruit length and diameter and peduncle diameter, increased TA, TSS and vitamin C, reduced TSS/TA, pH, pulp coloration and sensory acceptance of the fruits;phosphorus deficiency reduced fruit mass with and without crown, fruit and crown length, potassium deficiency reduced fruit mass with and without crown, length and diameter peduncle and calcium deficiency reduced peduncle diameter. Peel thickness was not affected by any deficiency. Nitrogen is the nutrient that most influenced the fruits quality of pineapple “Jupi”.

关键词： Fruit Quality Nutrient Solution Fruit Mass

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Diagnosis of Boron Deficiency in Green Dwarf Coconut Palm

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Agricultural Sciences 2015年第1期6卷 164-174页

作者： leandro glaydson da rocha pinho Pedro Henrique Monnerat Andre Assis Pires Marta Simone Mendonca Freitas Claudio Roberto Marciano Instituto Federal do Espirito Santo Campus ItapinaColatinaBrazil Universidade Estadual do Norte Fluminense Campos dos GoytacazesBrazil

The diagnosis of boron deficiency in coconut palms has been hampered by lack of information about its distribution in the plant. Two experiments were conducted, one in a greenhouse to induce boron deficiency in dwarf green coconut palms, and other in the field, in which the plants received doses of boric acid, B(OH)3. The objective was to verify symptoms of boron deficiency and boron content variation in canopy, leaves and folioles (or leaflets). Boron deficient plants led leaves and folioles to become deformed. The deficient and sufficient contents of boron varied significantly in the canopy, but did not vary in leaves. The boron content increased significantly from bottom to the apex of the folioles in both treatments. To survey the level of boron in the coconut palm, the ideal is, using samples taken from the youngest leaf, to calculate the relation between the boron content in the apex of the foliole and the content in the center or in the folioles bottom, with minimum values 2.2 or 2.7, respectively.

关键词： Symptoms Leaf Analysis Deficiency Induction Boric Acid Samples Cocos nucifera

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