Growth and fruit production of asian pear trees grown on Y-, T-, and vase-training systems

Choi, Jang-Jeon; Gu, Mengmeng; Choi, Jong-Soo; Han, Jeom-Hwa; Yim, Sun-Hee; Kim, Yoon-Kyeong; Jung, Seok-Kyu; Choi, Hyun-Sug

doi:10.1007/s13580-014-0107-5

Cited by 10 publications

(10 citation statements)

References 13 publications

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“…Researchers have focused on the process of stone cells development and buildup in pears, which leads to lower interior fruit quality [ 43 ]. Despite accounting for just 20-30% of mature stone cells [ 16 ], lignin has been postulated to play an important function in stone cells growth.…”

Section: Discussionmentioning

confidence: 99%

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Khedr,

Khedr

2024

BMC Plant Biol

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Background This study aimed to investigate the impact of protocatechuic acid (PRC) treatments on the productivity and fruit quality of 'Le-Conte' pears, with a specific focus on productivity, stone cells content, and antioxidant activity. The research spanned over three consecutive cultivating seasons, with the first season serving as a preliminary study to determine the optimal PRC concentrations and the most effective number of spray applications. During the initial season, response surface methodology (RSM) was employed to optimize PRC concentration and application frequency. PRC was evaluated at concentrations ranging from 50 to 400 ppm, with treatment frequencies of either once or twice. Considering the optimal conditions obtained from RSM results, PRC treatments at 200 ppm and 300 ppm were applied twice, and their respective effects were studied in comparison to the control in the following seasons. Results RSM results indicated that PRC at 200 and 300 ppm, applied twice, once during full bloom and again three weeks later, yielded the most significant effects. Subsequent studies revealed that PRC treatments had a substantial impact on various aspects of fruit production and quality. Applying 300 ppm PRC once during full bloom and again three weeks later resulted in higher fruit set percentages, lower fruit abscission, and enhanced fruit yield compared to untreated trees. Additionally, the 200 ppm PRC treatment maintained physicochemical characteristics such as fruit color, increased total soluble solids (TSS), and total sugar, and maintained higher ascorbic acid content and antioxidant capacity in the fruits while reducing stone cells content and lignin. Notably, enzyme activities related to phenylpropanoid metabolism and stone cells, including phenylalanine ammonia-lyase (PAL), cinnamate-4-hydroxylase (C4H), 4-Coumarate-CoA Ligase (4CL), cinnamyl alcohol dehydrogenase (CAD), and cinnamoyl-CoA reductase (CCR), as well as peroxidase, polyphenol oxidase, and laccase, were significantly regulated by PRC treatments. Conclusion Overall, this study suggests that PRC treatments are suitable for enhancing pear yield and quality, with PRC at 200 ppm being the more recommended option over 300 ppm. This approach serves as an effective strategy for achieving a balance between enhancing the productivity and fruit quality of 'Le-Conte' pears.

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Section: Discussionmentioning

confidence: 99%

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Khedr,

Khedr

2024

BMC Plant Biol

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“…4). 소식재배를 한 평덕배상형은 TCSA가 크고 주지가 3개이므로 많은 꽃눈형성으로 8년 동안 주당 225kg이 생산되어 '신고' 배와 유사하게 수량증수 효과가 가장 높았다 (Choi et al, 2014;Sosna and Czaplicka, 2008). 영양생장(TCSA)이 활발하 면 과실 생산성 향상에도 영향을 미치는데 (Robinson et al, 1991), 주당 TCSA 증가에 따른 수량증가(r 2 = 0.7862)와 ha당 TCSA 증가에 따른 수량 증가(r 2 = 0.8418)의 관련성이 확인되었다 (Fig.…”

Section: 결과 및 고찰unclassified

“…'신고'를 대체할 수 있는 추석용 배인 '만풍배'는 수세가 비교적 강하고 단과지 확보가 어려워서 재배수형에 따라 수체 및 과실품질이 쉽게 영향을 받으므로 고 품질의 과실 생산을 위한 장기간의 연구가 요구되고 있다 (Cho et al, 2003). '만풍배'의 수형에 따라 재식밀도를 달리한 8년간 의 시험에서 평덕형과 Y자형은 ha당 100 여톤의 누적 수량이 생산되어 '신고' 배 (Choi et al, 2014) 지 수형(Y자형, Y-II형, 평덕형, 평덕배상형)을 적용하여 남부지방에 적합한 수형을 제시하고자 본 시험을 수행하였다. Y자형 과 평덕형은 수관점유율이 높게 형성되었고 8년차에는 70-80%의 점유율을 보였다.…”

Section: Systemunclassified

Comparision of Growth Characteristics and Productivity of Young Trees of a New Cultivar ‘Manpungbae’ Trained to Trellis Systems

Choi¹,

Choi²,

Han³

et al. 2017

HST

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One-year old pear (Pyrus pyrifolia L.) trees of a new commercial cultivar 'Manpungbae', recently developed in South Korea, were planted in 2001 (planting year 1) and trained to four trellis systems: Y-trellis, Y-II-trellis, pergola, and vase-pergola. To evaluate training systems in the local area (southern Korea), tree growth responses were compared for each trellis system from planting years 3 to 8. For trees trained to Y-trellis and pergola systems, a high proportion of land covered by tree canopy was maintained over the study duration, with 70-80% coverage in year 8. Eight-year cumulative yield per tree was increased in the vase-pergola system with a low planting density and an additional scaffold. Compared with other systems, cummulative yield use efficiency was greatest in Y-II-trellis and pergola systems in years 5 and 8. Compared with Y-II-trellis and vase-pergola systems, the 8-year cumulative yield per hectare was two fold greater for trees trained to the Y-trellis (103 tons) and pergola systems (101 tons). Use of the pergola system improved average fruit weight and fruit soluble solid contents, as well as net income in year 8. Given that we observed reduced fruit productivity and increased labor hours (pruning and orchard work), we consider the Y-trellis and pergola systems to be less valuable trellis systems than the others evaluated. fruit quality, pergola, Pyrus pyrifolia, Y-trellis, yield

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“…A wire support combined with a multiple-leader system enables even stronger canopy shape modification. The most popular V-shaped canopy systems, recommended as an alternative for orchards with high tree densities, are the Güttingen-V system and the Y system (Tatura) [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Usefulness of Living Mulch in Rows in a Dwarf Pear, Pyrus communis L., Orchard

Sosna,

Fudali

2023

Agriculture

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The key problem in the cultivation of densely planted dwarf orchards is the removal of weeds—trees’ competitors for habitat resources. There is an urgent need to look for ecological methods of weed control as an alternative to herbicides that are harmful to the environment. The use of living mulch (LM) in tree rows additionally improves soil quality but usually weakens tree growth and may reduce yield. The aim of this 11-year experiment was to assess the impact of the use of two different LMs in rows (Trifolium repens—Tr and Agrostis capillaris—Ac) on the growth, yield, and fruit quality of three pear cultivars on Quince S1 rootstock compared to herbicide fallow. The presence of LM did not significantly affect tree growth. There was no significant effect of either mulch on the cumulative yield. However, for the first 4–6 years, the yield was clearly lower than in the control, which changed in the later years of the experiment. When LMs were used, pear trees showed a significantly lower tendency to alternate fruiting. The average fruit weight was significantly lower in Tr, but the other parameters of external fruit quality did not differ significantly. Furthermore, a smaller share of ultra-small fruit was found with LM compared to the control. The LM did not significantly affect such parameters as the content of soluble solids, vitamin C, Ca, Mg, and P. The use of Ac in dwarf pear orchards with sowing in tree rows is recommended in the 2nd or 3rd year after planting at the earliest.

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Growth and fruit production of asian pear trees grown on Y-, T-, and vase-training systems

Cited by 10 publications

References 13 publications

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Comparision of Growth Characteristics and Productivity of Young Trees of a New Cultivar ‘Manpungbae’ Trained to Trellis Systems

Usefulness of Living Mulch in Rows in a Dwarf Pear, Pyrus communis L., Orchard

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