Fruit thinning with specific reference to citrus species : A review

Ouma, George

doi:10.5251/abjna.2012.3.4.175.191

Cited by 32 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ouma (2012) pointed out that thinning improves quality, as it provides better fruit size, shape, color and higher SS content. Fruit size can be improved by increasing carbohydrate availability from the source or by increasing sink capacity.…”

Section: Fruit Thinning and Hormone Applicationmentioning

confidence: 99%

Factors affecting citrus fruit quality: Emphasis on mineral nutrition

Aular¹,

Cásares²,

Natale³

2017

Científica

View full text Add to dashboard Cite

There are some reviews, available in the literature that considers mineral elements effects on fruit quality. However, most studies refer to temperate fruits, such as apple, or to some tropical fruits, such as mango, guava, banana, pineapple and passion fruit. In the case of citrus fruits, it is necessary to compile the information that has been generated recently. The objective of this review was to present and comment some information about the influence of mineral elements on citrus fruit characteristics. It emphasized that potassium has been the most evaluated macronutrient, whereas calcium and magnesium were the least. Potassium was the element with the largest influence on fruit characteristics, followed by nitrogen and phosphorus. The most consistent result related to potassium was the positive effect on fruit fresh mass. Zinc was the most evaluated micronutrient, followed by boron, which was the most influential micronutrient on quality, especially due to its positive effect on fruit fresh mass and juice percentage. Lack of information regarding mineral nutrition effect on citrus fruit quality was confirmed and was more evident for macronutrients. Additional keywords:Citrus; fruit production, nutrients. ResumoAlgumas revisões que considerem os efeitos dos elementos minerais na qualidade de frutas estão disponíveis na literatura; no entanto, a maioria faz referência às frutíferas de clima temperado, como a maçã ou algumas tropicais como manga, goiaba, banana, abacaxi e maracujá. No caso das frutas cítricas ou citros, pode-se argumentar que é necessário recopilar as informações que têm sido geradas recentemente. O objetivo desta revisão foi apresentar e comentar algumas informações sobre a influência de elementos minerais sobre as características das frutas destas frutíferas. Ressalta-se, que o potássio tem sido o macronutriente mais avaliado, enquanto que o cálcio e o magnésio foram os menos pesquisados. O potássio foi o elemento com maior influência nas características da fruta, seguido do nitrogênio e do fósforo. O resultado mais consistente do potássio foi o efeito positivo sobre a massa fresca da fruta. O zinco foi o micronutriente mais avaliado nos experimentos, seguido do boro que foi o micronutriente mais influente na qualidade, especialmente pelo seu efeito positivo sobre a massa fresca e a porcentagem de suco das frutas. Foi confirmada a carência de informações referentes ao efeito da nutrição mineral sobre a qualidade das frutas dos citros, sendo mais evidente para os macronutrientes. Palavras-chave adicionais:Citrus;fruticultura; nutrientes.

show abstract

Section: Fruit Thinning and Hormone Applicationmentioning

confidence: 99%

Factors affecting citrus fruit quality: Emphasis on mineral nutrition

Aular¹,

Cásares²,

Natale³

2017

Científica

View full text Add to dashboard Cite

show abstract

“…Different studies confirmed the effect of chemical thinning agents (synthetic auxins) on mandarin thinning [4,5]. However, many chemicals are being released by the chemical companies [1] and other thinning methods could be assessed.…”

Section: Introductionmentioning

confidence: 95%

“…Fruit thinning is the removal of certain flowers or fruitlets in order to improve fruit yield and quality and return bloom for the following year [1]. The final size of citrus fruits depends on the degree of competition among them, apart from other factors.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Device to Assess the Effect of Mechanical Thinning of Flower Buds, Flowers and Fruitlets Related to Fruitlet Developing Stage

et al. 2019

View full text Add to dashboard Cite

Mandarin thinning is done by hand, increasing labor costs and raising total crop production costs. Mechanical thinning has been tested in peaches and other fruits. To achieve the maximum efficiency thinning has to be applied at a specific stage of vegetative development. In this research study, the mechanical thinning of 'Clemenrubi' mandarin branches during the different fruit development stages have been assessed using a vibratory laboratory device (amplitudes 0.015 and 0.030 m and frequencies 34.8 and 37.8 Hz). Branches with flower buds, flowers, small green fruits, and medium green fruits were tested for 12 weeks, in two different seasons. It was possible to mechanically detach flower buds, flowers, and green fruits using different combinations of amplitudes and frequencies.Removal percentage decreased when increasing retention traction force, according to a logarithmic regression model. A significant increment in equatorial diameter and retention traction force was registered when the fruit setting was finishing, while mass had a similar development with a week delay. During fruit setting (weeks 5, 6, and 7) removal percentage was higher, while the retention force was very low. The first weeks just after the natural thinning could be considered the adequate time for a mechanical thinning operation.

show abstract

“…Secara umum, buah pada tanaman dengan kelebatan yang tinggi akan mempunyai ukuran buah yang lebih rendah dibandingkan tanaman yang berbuah jarang (Ouma 2012). Pada penelitian penjarangan buah apel, disimpulkan bahwa tanaman yang mempunyai jumlah buah yang lebih rendah karena dijarangkan akan mempunyai buah dengan ukuran berat dan TPT yang lebih tinggi dibandingkan kontrol (Meland 2009).…”

Section: Sifat Fisik Buahunclassified

Pengaruh Penyambungan Plantlet Jeruk Siam Kintamani (Citrus nobilis Lour.) yang Diregenerasi Melalui Embriogenesis Somatik Terhadap Pertumbuhan dan Produksi Tanaman

Devy¹,

Yenni²,

Hardiyanto

2018

J.Hort

View full text Add to dashboard Cite

ABSTRAK.Plantlet jeruk hasil perbanyakan embriogenesis somatik (ES) in vitro telah banyak dihasilkan. Meskipun demikian, pertumbuhan vegetatif dan generatif di lapang belum dievaluasi. Tujuan dari penelitian ini adalah untuk mengevaluasi kemampuan pertumbuhan vegetatif dan generatif tanaman jeruk hasil sambung dengan plantlet asal ES dibandingkan mata tempel asal BPMT. Penelitian dilakukan di Kebun Percobaan Tlekung, Balai Penelitian Tanaman Jeruk dan Buah Subtropika, mulai September 2013 sampai dengan Desember 2016. Materi penelitian adalah tanaman jeruk dengan batang atas asal (a) plantlet hasil regenerasi melalui ES tanpa bagian akarnya dan (b) mata tempel yang berasal dari Blok Penggandaan Mata Tempel (BPMT), yang masing-masing disambungkan dan ditempelkan dengan batang bawah Japansche Citroen (JC) berumur 8 bulan setelah transplanting. Tanaman hasil sambung berumur 1 tahun dipindah dan ditanam di lapang dengan jarak tanam rapat 1,5 m x 1,5 m. Pengamatan pertumbuhan dilakukan mulai umur 18 -42 bulan setelah transplanting (BST). Hasil penelitian menunjukkan bahwa tanaman jeruk dengan batang atas hasil ES dapat tumbuh, berkembang, dan berproduksi sama dengan tanaman dengan batang atas asal BPMT. Tinggi tanaman, diameter batang atas, dan diameter batang bawah pada tanaman ES tidak berbeda nyata dengan tanaman BPMT. Tanaman pada dua perlakuan mulai berbunga pada umur 18 BST, dengan jumlah bunga, buah, dan persentase fruitset yang tidak berbeda nyata antarkedua perlakuan, demikian juga pada pembungaan pada tahun berikutnya. Jumlah buah pada tahun ke-2 berbuah (September 2014) dan akhir pengamatan (September 2016) menunjukkan terjadi kenaikan sebesar 215,7% dan 176,1% pada masing-masing perlakuan ES dan BPMT, sedangkan pada tahun ke-4 pembuahan (2016), perlakuan tanaman jeruk hasil ES mempunyai jumlah buah/tanaman dan berat buah total/tanaman lebih banyak secara nyata dibandingkan asal BPMT. Sifat fisik dan kualitas buah (vit C, total keasaman, dan TPT) yang dihasilkan relatif sama. Tanaman jeruk siam Kintamani yang berasal dari plantlet hasil perbanyakan ES in vitro dan disambungkan dengan batang bawah JC dapat tumbuh, berkembang, dan berproduksi dengan normal di lapang.Kata kunci: Siam Kintamani (Citrus nobilis Lour.); BPMT; Sambung; Tempel; Embriogenesis somatik ABSTRACT. The plantlets derived from citrus somatic embryogenesis (SE) in vitro have been widely produced. However, their vegetative and generative growth in the field has not been evaluated. The aimed of this research was to evaluate the ability of vegetative and generative growth both of SE and Budwood Multiplication Block (BMB) derived citrus plants. The research was conducted in Tlekung Experimental Garden, Indonesian Citrus and Subtropical Fruit Research Institute, from September 2013 to December 2016. The citrus plants derived from (a) root-decapitated plantlets and (b) buds come from BMB that were grafted and budded, respectively on 8 months old JC rootstock. One-year old grafted and budded plants were planted at field using a dense spacing (1.5 ...

show abstract

Fruit thinning with specific reference to citrus species : A review

Cited by 32 publications

References 14 publications

Factors affecting citrus fruit quality: Emphasis on mineral nutrition

Factors affecting citrus fruit quality: Emphasis on mineral nutrition

Laboratory Device to Assess the Effect of Mechanical Thinning of Flower Buds, Flowers and Fruitlets Related to Fruitlet Developing Stage

Pengaruh Penyambungan Plantlet Jeruk Siam Kintamani (Citrus nobilis Lour.) yang Diregenerasi Melalui Embriogenesis Somatik Terhadap Pertumbuhan dan Produksi Tanaman

Contact Info

Product

Resources

About