Abstract
Abstract A field experiment was conducted at Agronomy research farm, KPK, The University of Agriculture Peshawar during season 2016-17. The experiment was carried out in RCBD having 4 replications. The treatment consists of potassium levels (0, 60, 90 and 120 kg ha-1) and application time (full and split application). Wheat variety Pirsabak-2013 was sown at the rate of 120 kg ha-1 in rows 3 m long and 30 cm apart. The results showed significant effect (p≤0.05) of potassium levels on dry matter partitioning in different parts of wheat. Maximum dry matter partitioning in Leaf (116.28 and 156.51gm-2), Stem (227.85 and 386.53gm-2), Spike (22.95 and 214.05gm-2), and Total dry matter (407.31 and 757.09gm-2) at booting and anthesis stage, and Maximum dry matter partitioning in Leaf (345 gm-2), Stem (420.1gm-2), Spike straw (365.46gm-2), Grain (515.5gm-2) and Total dry matter (1646.1gm-2) at physiological maturity stage were recorded with potassium application at a rate of 90 kg ha-1. The interaction of potassium levels and application time had also a significant effect on total dry matter partitioning. Potassium 90 kg ha-1 with full dose application at booting stage produced maximum dry matter partitioning (413.18gm-2) and at anthesis and physiological maturity stage maximum dry matter partitioning (763.45 and 1648.3gm-2) were recorded with potassium 90 kg ha-1 and split dose application(half at sowing + half at tillering). Based on the results, among potassium levels, 90 kg ha-1 produced more dry matter partitioning as compare to other levels of potassium. So potassium level 90 kg ha-1 is recommended for high dry matter partitioning in different parts of wheat in Peshawar valley. Keywords: Application time; Dry matter partitioning; Peshawar valley; Potassium levels http://dx.doi.org/10.19045/bspab.2018.700158
Highlights
2), Spike straw (365.46gm-2), Grain (515.5gm-2) and Total dry matter (1646.1gm-2) at physiological maturity stage were recorded with potassium application at a rate of 90 kg ha-1
Leaf dry matter at anthesis and physiological maturity stages was significantly affected by potassium levels, analysis showed that maximum leaf dry matter (156.51 and 345.03) gm-2 was obtained with the application of potassium at 90 kgha-1 and minimum leaf dry matter (135.3 and 299.3) gm-2 was recorded with potassium 60 kg ha-1
Statistical analysis shows that mean maximum stem dry matter (227.9, 386.5,420.1) gm-2 at booting, anthesis and physiological maturity stages were produced at potassium application of 90 kg ha-1 and minimum stem dry matter (192.24, 230.01, 238.5)gm-2 was obtained in plots treated with potassium 60 kg ha-1
Summary
Pakistan is one of the leading country in production of wheat because wheat occupy largest area under single crop that is 9180 thousands hectares and produce 25.478 million tons (Pakistan bureau of statistics, 2015).Our country produce 3.16% of the world production of wheat which contributes 2.1% to Gross domestic production and added 10% value to agriculture. The concentration of K available to the plant is often influenced by the availability abundance of other essential elements It play a key role in growth and sustainable crop production [7] Cereals can uptake 23% more potassium legume [8]. The deficiency of K leads to decrease the amount of protein and nitrogen uptake in the form of nitrate [12] so addition of potassium to wheat crops increase metabolism, quality, because it helps in grain filling, kernels weight and strength of straw [13] and translocation of photosynthesis. The material was divided into leaf, stem and spikes, and spike in grains and spike straw at anthesis and physiological maturity stage, kept in paper bags and sun dried up to constant weight. Means were compared using least significant difference (LSD) test at P≤0.05 upon significant F-test [13]
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