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- W2811075083 abstract "To study the effect of nutrients (N, P and K) on leaf nutrient status and their correlation with fruit quality and yield an experiment was conducted during the year 2015-2016 at the experimental field of Division of fruit Science Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar. The experimental site was located at 34.010 North latitude and 74.50 East longitude at an elevation of 1606 meters above mean sea level. The climate of experimental site was temperate type. The maximum temperature of the valley was 24.50 C and humidity of 43.90 C during the summer months. 30-40 healthy leaves free from insect damage, diseases and deficiency symptoms were collected at commercial harvesting stage during 2015 from mid portions of current season’s shoots at chest height randomly from the four quadrants of plant as per the procedure given by Chapman (1964). The samples after processing and proper digestion were analyzed for different nutrients viz. N, P, K, Ca, Mg, S, Zn, Cu, Mn and Fe and the correlation between leaf nutrients and fruit quality and yield were determined. The experiment consisted of 10 treatments of different levels nitrogen, phosphorus and potassium. Results revealed that highest leaf nitrogen (2.19%) was recorded in T4 treatment with 105 g N, 35 g P2O5 and 150 g K2O. The highest leaf phosphorus (0.19%) was recorded in T7 treatment with 85g N, 45g P2O5 and 150g K2O. Highest leaf potassium (1.62%) in T10 treatment with 85g N, 35g P2O5 and 180g K2O. Results indicated that treatments had non-significant effect on leaf calcium, magnesium and sulphur. However, the highest leaf calcium (1.76%) was recorded in T4 treatment with 105g N, 35g P2O5 and 150g K2O ; highest leaf magnesium (0.38%) was recorded with 105g N, 35g P2O5, 150g K2O (T4 treatment) and highest leaf sulphur (0.40%) was recorded in T4 treatment with 105g N, 35g P2O5 and 150g K2O. Maximum leaf zinc (31.3 mg kg-1) was recorded in T4 treatment with 105g N, 35g P2O5 and 150g K2O. Leaf copper content differed significantly among all the treatments. Highest leaf copper (14.60 mg kg-1) was recorded with 105g N, 35g P2O5, 150g K2O (T4 treatment). Leaf manganese content differed significantly among all the treatments. Highest leaf manganese (78.8 mg kg-1) was recorded with 105g N, 35g P2O5, 150g K2O (T4 treatment). Highest leaf iron (126.6 mg kg-1) was recorded in T4 treatment with 105g N, 35g P2O5 and 150g K2O. The relationship of leaf nutrient content with growth, fruit quality and yield revealed that the nitrogen content in leaves was positively and significantly correlated with tree height (r=0.897), annual shoot extension growth (r=0.801), tree girth (r=0.818), fruit length (r=0.809), fruit weight (r=0.775) and fruit yield (r=0.846). The relationship between leaf phosphorus with tree height, annual shoot extension growth, tree girth, fruit length, fruit diameter, fruit weight and fruit yield was positive but non-significant. The potassium content of leaf was positive and non-significant with tree height, annual shoot extension growth, tree girth, fruit length, fruit weight and fruit yield. Leaf calcium was positively and non-significantly correlated with tree height, annual shoot extension growth, tree girth, fruit size, fruit weight and fruit yield. Leaf magnesium content was positively and significantly correlated with tree height (r=0.830), annual shoot extension growth (r=0.923), tree girth (r=0.853), fruit length (r=0.835), fruit weight (r=0.810) and fruit yield (r=0.950). The sulphur content in leaves was positive and significantly correlated with tree height (r=0.721), annual shoot extension growth (r=0.718), tree girth (r=0.846), fruit length (r=0.692), fruit weight (r=0.865) and fruit yield (r=0.726). Leaf zinc was positively and significantly correlated with annual shoot extension growth (r=0.748), tree girth (r=0.648), fruit length (r=0.741) and fruit yield (r=0.732). The leaf copper content was positive and significantly correlated with tree height (r=0.778), annual shoot extension growth (r=0.662), fruit weight (r=0.801) and fruit yield (r=0.661). Leaf iron was positively and significantly correlated with tree height (r=0.705), annual shoot extension growth (r=0.763), trunk girth (r=0.791), fruit length (r=0.747), fruit weight (r=0.740) and fruit yield (r=0.737). The manganese content in leaves was positively and significantly correlated with trunk girth (r=0.642) and fruit diameter (r=0.707)." @default.
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- W2811075083 date "2018-04-01" @default.
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- W2811075083 title "Effect of nitrogen, phosphorus and potassium on leaf nutrient status of high density apple cv. Silver Spur under temperate conditions of Kashmir" @default.
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