EVALUATION OF BUCKWHEAT SPECIES FOR YIELD AND YIELD COMPONENTS UNDER VARIOUS NP LEVELS IN SKARDU BALTISTAN
Ghulamullah Saqib and Inamullah, Department of Agronomy,
Khyber Pukhtunkhwa Agricultural University Peshawar
The performance of two buckwheat species (Common and Tartary buckwheat) was evaluated at various N and P levels at Karakorum Agricultural Research Sub-station Skardu (Baltistan) during summer 2009. Three N levels (0, 50 and 100 kg ha-1) and four P levels (0, 40, 80 and 120 kg ha-1) were used. The experiment was conducted in randomized complete block design with split plot arrangement having four replications. Species were allotted to main plots and NP combinations to subplots of size 1.8 m x 5 m, having 6 rows 5 m length with spacing 0.3 m. Statistical analysis of the data revealed that common buckwheat recorded significantly higher emergence (157.6 vs. 150.7 m-2), early emergence (6.1 vs. 9.3 days), flower initiation (27.1 vs. 31.8 days) and maturity (85.2 vs. 89.7 days), higher plant height (66.2 vs. 49.5 cm), more lodging (11.3% vs. 5.6%), higher number of grains head-1 (7.1 vs. 6.7), more 1000-grain weight (25.0 vs. 22.3 g) and biological yield (4280 vs. 4157 kg ha-1) as compared with tartary buckwheat. Tartary buckwheat on the other hand recorded higher number of branches plant-1 (3.9 vs. 3.0), more heads (2058.8 vs. 964.3 m-2), higher grain yield (1896 vs. 1494 kg ha-1) and higher harvest index (45.4 vs. 34.5%) as compared with common buckwheat. Higher N doses delayed flower initiation, maturity and increased lodging as against the higher P doses which hastened flower initiation and maturity and decreased lodging. All other parameters like plant height, branches plant-1, heads m-2, grains head-1, 1000-grain weight, grain yield, biological yield and harvest index were increased with increase in N and P levels. The interaction of nitrogen x species affected days to maturity, plant height, branches plant-1, lodging...