Harminder SinghSunpreet Kaur2022-01-122022-01-122021Sunpreet Kaur (2021). Effect of different spacing on growth, yield and fruit quality of lime and lemon (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810180663The present investigation entitled “Effect of different spacing on growth, yield and fruit quality of lime and lemon” was undertaken at Fruit Research Farm, Department of Fruit Science, Punjab Agricultural University, Ludhiana during 2020-21. The lime and lemon plants of cv. Kagzi lime, Limequat and Baramasi lemon budded on Rough lemon rootstock were planted during September, 2016 at six spacings i.e. 6 x 6 m, 6 x 5 m, 6 x 4 m, 5 x 5 m, 5 x 4 m and 4 x 4 m. Irrespective of cultivars, trees planted at 6 x 6 m distance recorded maximum vegetative growth in terms of trunk girth, tree spread and canopy volume and minimum was noted in trees planted at 4 x 4 m distance. Reproductive growth in terms of number of fruits and fruit yield per tree was also recorded maximum in trees planted at 6 x 6 m distance followed by trees planted at 6 x 5 m distance. But, productivity was found to be highest in 4 x 4 m planted trees. Fruits harvested from trees spaced at 6 x 6 m matured earlier and were superior in fruit quality (fruit size, weight, TSS, Vitamin C) as compared to other spacings. Solar radiation interception and canopy temperature was also maximum in trees spaced at 6 x 6 m and minimum in 4 x 4 m planted trees. Canker incidence was recorded maximum in 4 x 4 m planted trees and minimum in 6 x 6 m planted trees. Among the cultivars, Baramasi lemon gives two crops, whereas Kagzi lime and Limequat give one crop in a year. Growth, yield and fruit quality (fruit weight, size, juice percentage, TSS and Vitamin C) of Baramasi lemon was significantly more than Kagzi lime and Limequat. The radiation interception and canopy temperature was recorded highest in Limequat followed by Kagzi lime and minimum in Baramasi lemon. Incidence of citrus canker was recorded only in Kagzi lime during the present investigation.EnglishThesis