EFFECT OF NUTRIENT STATUS ON TREE GROWTH, FRUIT QUALITY AND YIELD IN PEAR cv. PATHARNAKH
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Date
2013
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Punjab Agricultural University, Ludhiana
Abstract
The present investigation entitled “Effect of nutrient status on tree growth, fruit quality and yield in pear cv. Patharnakh” was carried out at twenty five pear orchards established in and surroundings of Tarn Taran and Amritsar districts of Punjab during the year 2011-12. In various orchards of the districts soil characteristics showed ranges as given: soil pH (7.0-8.8), EC (0.19-0.44 dS/m), OC (0.15-0.71 %), CaCO3 (0.11-6.3 %)N (168.0-795.2 kg/ha), P (3.4-93.4 kg/ha) and K (60.0-386.8 kg/ha). Foliar nutrient content in the districts was determined to be: N (1.85-2.30 %), P (0.10-0.21 %), K (0.87-1.26%), Ca (1.43-4.73%), Mg (0.28-0.68%), Cu (3.8-10.2 ppm), Zn (13.8-49.8 ppm), Mn (67.2-234.6 ppm) and Fe (194-234 ppm).The pear orchards under survey had shown deficiency in P, K, Cu and Zn on the basis of leaf analysis and percentage was 8, 48, 8 and 32 per cent respectively. Almost 92, 60, 4 and 100 percent orchards exhibited higher range of leaf Ca, Mg, Mn and Fe contents respectively. Leaf N was significantly and positively correlated with fruit yield whereas, leaf P and K showed positive correlations with fruit yield with r values of 0.29 and 0.04 respectively but results were non-significant. Likewise, Leaf K showed positive and significant correlation with TSS (r = 0.39). Fruit weight showed positive significant correlation (r = 0.58) with leaf Mn content. Leaf Zinc (r = 0.49) showed positive significant correlation with fruit juice content. Leaf Mg showed positive significant correlation with Trunk Girth.
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