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Subject: Fruit Science × Author: Chawla, Himanshu × Start date: 2010 × Type: Thesis ×
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    Effect of plant spacing on vegetative and reproductive behaviour of guava (Psidium guajava L.) cv. Shweta
    (Punjab Agricultural University, Ludhiana, 2022) Chawla, Himanshu; Arora, N.K.
    The present investigation on the effect of plant spacing on vegetative and reproductivebehaviour of guava (Psidium guajava L.) cv. Shweta was carried out in the Fruit Research Farm, Department of Fruit Science, Punjab Agricultural University, Ludhiana during the year 2021- 22. The observations were recorded on five-year-old plants of guava cv. Shweta at densities viz. 6x5 m, 5x5 m, 5x4 m, 5x3 m, 4x4 m and 4x3 m. Each replication consists of a unit of five trees. The experiment was laid out as per Randomized Block Design. The present investigation revealed that characters like scion girth, stock girth, scion stock ratio, canopy volume and stomatal density increase with an increase in plant spacing while plant height, leaf size and crotch angle have reversed correlation with spacing. Fruiting attributes viz. flower bud density (38.86 %), fruit set (66.12 %) and fruit retention (61.22 %) were recorded higher in trees spaced at 6x5 m as compared to other spacings; whereas, trees planted at closers pacing (6m x 3m) has taken higher 76 days from fruit set to maturity. The number of fruits per tree, fruit yield per tree, fruiting density and yield efficiency (maximum in 5x5 m spacing) were increased with an increase in plant spacings (4x3 m to 6x5 m) while seed number per fruit was found to be decreased. Quality characters namely palatability rating (8.9), TSS (12.6 %), pulp content (93.72 %), vitamin C (228.1 %), total sugars (8.42 %) and pectin content (1.01 %) were found maximum in winter season crops specifically, at wider spaced plants (6x5 m and 5x5 m). With wider plant spacing (from 4x3 m to 6x5 m), solar radiation interception and canopy temperature increased with an increase in the spacing of plants while the relative humidity was found to be decreased. The present study suggested that guava planted at 5x3 m (267 trees/ acre) registered higher yield per acre as compared to others treatments. However, tree spaced at 5m x 5m had significantly higher yield vis-à-vis improved fruit quality as compared to trees planted at recommended spacing i.e. 6m x 5m.
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    Effect of plant spacing on vegetative and reproductive behaviour of guava (Psidium guajava L.) cv. Shweta
    (Punjab Agricultural University, Ludhiana, 2022) Chawla, Himanshu; Arora, N.K.
    The present investigation on the effect of plant spacing on vegetative and reproductivebehaviour of guava (Psidium guajava L.) cv. Shweta was carried out in the Fruit Research Farm, Department of Fruit Science, Punjab Agricultural University, Ludhiana during the year 2021- 22. The observations were recorded on five-year-old plants of guava cv. Shweta at densities viz. 6x5 m, 5x5 m, 5x4 m, 5x3 m, 4x4 m and 4x3 m. Each replication consists of a unit of five trees. The experiment was laid out as per Randomized Block Design. The present investigation revealed that characters like scion girth, stock girth, scion stock ratio, canopy volume and stomatal density increase with an increase in plant spacing while plant height, leaf size and crotch angle have reversed correlation with spacing. Fruiting attributes viz. flower bud density (38.86 %), fruit set (66.12 %) and fruit retention (61.22 %) were recorded higher in trees spaced at 6x5 m as compared to other spacings; whereas, trees planted at closers pacing (6m x 3m) has taken higher 76 days from fruit set to maturity. The number of fruits per tree, fruit yield per tree, fruiting density and yield efficiency (maximum in 5x5 m spacing) were increased with an increase in plant spacings (4x3 m to 6x5 m) while seed number per fruit was found to be decreased. Quality characters namely palatability rating (8.9), TSS (12.6 %), pulp content (93.72 %), vitamin C (228.1 %), total sugars (8.42 %) and pectin content (1.01 %) were found maximum in winter season crops specifically, at wider spaced plants (6x5 m and 5x5 m). With wider plant spacing (from 4x3 m to 6x5 m), solar radiation interception and canopy temperature increased with an increase in the spacing of plants while the relative humidity was found to be decreased. The present study suggested that guava planted at 5x3 m (267 trees/ acre) registered higher yield per acre as compared to others treatments. However, tree spaced at 5m x 5m had significantly higher yield vis-à-vis improved fruit quality as compared to trees planted at recommended spacing i.e. 6m x 5m.