Comparison of direct seeded and transplanted rice in response to zinc under salt-affected soil.
Plant height, number of tillers/plant, spike length and number of grains/spike showed significant results in direct seeded rice with the application of zinc at different levels under salt affected soil but the values of growth parameters in transplanted rice with application of Zn were lower than direct seeded rice (Table 1). Highest plant height was attained with the application of 15 kg Zn/ha (101.3cm) followed by 10 kg Zn/ha (97.7cm). 15 kg Zn/ha got the highest position in number of 0 kg Zn/ha tillers/plant (11.7) followed by 10 kg Zn/ha and 5 kg Zn/ha attaining 11.3 and 11.0, respectively. Spike length of direct seeded rice had gained highest rank in 15 kg Zn/ha (28.3cm). 10 kg Zn/ha and 5 kg Zn/ha gave the statistical similar spike length. Highest number of grains/spike was attained by the addition of 15 kg Zn/ha (98.3) followed by 10 kg Zn/ha (94.7). Transplanted rice showed significant results in plant height and number of grains/spike while number of tillers/plant and spike length attained non significant findings with the treatment of different zinc levels under salt affected soil (Table 1). 15 kg Zn/ha, 10 kg Zn/ha and 5kg Zn/ha attained statistically similar results in plant height under salt stress conditions. Number of tillers/plant was the highest in 15 kg Zn/ha (8.3) while other zinc doses are approximately equal with 0 Kg Zn/ha. Number of grains/spike was the highest in 15 kg Zn/ha (82.7) which was statistically at par with 10 kg Zn/ha (82.3) followed by 5 kg Zn/ha. Plant height, number of tillers/plant, spike length and number of grains/spike was gained better values than 0 kg Zn/ha. Excess soluble salts ([Cl.sup.-] and S[O.sub.4.sup.2-] of [Na.sup.+], [Ca.sup.2+] and [Mg.sup.2+]) in saline soils cause high osmotic pressure and complex interactions of Na, Ca, K and other micronutrients such as Zn which disturb equilibrium in rhizosphere and plant growth. Imbalanced nutrient affects Zinc availability (Girija et al., 2013).
Paddy yield was significantly affected with different doses of zinc in direct seeded rice (Table 2). Maximum paddy yield of direct seeded rice was attained with the application of 10 kg Zn/ha (2.61 t/ha) followed by 15 kg Zn/ha application and transplanted rice under salt affected soil also shows significant results with the application of zinc at different levels (Table 2). Paddy yield at 10 Kg Zn/ha in direct seeded rice was closely followed by 15 kg Zn/ha application (2.41 t/ha) in transplanted rice (2.45 t/ha) which was statistically at par with paddy yield. However, overall paddy yield of direct seeded rice was 5 % higher than the transplanted rice. Paddy yield of direct seeded rice was higher (5%) than traditionally transplanted rice. Nasir et al. (2006) concluded that yield and yield components were significantly affected with the application of zinc.
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Muhammad Arshad Ullah (a)*, Imdad Ali Mahmood (a), Badar-uz-Zaman (a), Syed Ishtiaq Haider (a), Muhammad Suhaib (a), Arshad. Ali (a) and Muhammad Jamil (b)
(a) Land Resources Research Institute, National Agricultural Research Centre, Park Road, Islamabad-45500, Pakistan
(b) Soil Salinity Research Institute, Pindi Bhattian, Pakistan
(received March 29, 2016; revised August 24, 2016; accepted September 09, 2016)
* Author for correspondence;
Table 1. Effect of zinc on growth parameters of direct seeded and transplanted rice (Oryza sativa) grown under salt-affected soil Treatments Direct seeded rice Plant Number Spike Number height of tillers/ length of grains/ (cm) plant (cm) spike 0 kg Zn/ha 93.0c 10.0b 23.3c 85.7d 5 kg Zn/ha 95.3bc 11.0ab 25.7b 90.0c 10 kg Zn/ha 97.7b 11.3ab 26.0b 94.7b 15 kg Zn/ha 101.3a 11.7a 28.3a 98.3a LSD 2.7 1.4 1.4 2.1 Treatments Transplanted rice Plant Number Spike Number height of tillers/ length of grains (cm) plant (cm) spike 0 kg Zn/ha 85.0b 7.3 19.3 76.7c 5 kg Zn/ha 87.0a 7.7 20.0 80.0b 10 kg Zn/ha 87.7a 7.7 20.0 82.3a 15 kg Zn/ha 87.7a 8.3 22.0 82.7a LSD 1.8 NS NS 2.2 Means bearing same letter(s) in each column are statistically similar at p = 0.05. Table 2. Effect of zinc on paddy yield (t/ha) of direct seeded and transplanted rice (Oryza sativa) grown under salt-affected soil Treatments Direct seeded Transplanted rice rice 0 kg Zn/ha 1.88 d 1.89 d 5 Zn kg/ha 2.25 c 2.15 c 10 Zn kg/ha 2.61 a 2.25 c 15 Zn kg/ha 2.41 b 2.45 b Means bearing same letter(s) in each column are statistically similar at p = 0.05.
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|Title Annotation:||Short Communication|
|Author:||Ullah, Muhammad Arshad; Mahmood, Imdad Ali; Badar-uz-Zaman; Haider, Syed Ishtiaq; Suhaib, Muhammad;|
|Publication:||Pakistan Journal of Scientific and Industrial Research Series B: Biological Sciences|
|Date:||Jul 1, 2017|
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