Transformation of zinc in soils under submerged condition and its relation with zinc nutrition of rice (original) (raw)
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2016
The field experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2014 to study the influence of different levels of zinc applied from two sources on the yield and Zn uptake of BRRI dhan49. The soil was silt loam in texture having pH 6.8, organic matter 2.72%, total N 0.151 %, available P 4.00 mg kg-1 , available K 0.08 cmol kg-1 , available S 15.9 mg kg-1 and available Zn 0.90 mg kg-1. The experiment was laid out in a randomized complete block design with three replications. There were seven treatments with different rates of Zn viz. T 1 : Zn0, T 2 : Zn1 as ZnO, T 3 : Zn2 as ZnO, T 4 : Zn3 as ZnO, T 5 : Zn1 as ZnSO 4 , T 6 : Zn2 as ZnSO 4, and T 7 : Zn3 as ZnSO 4 where 0, 1, 2 and 3 represent the rate of Zn in kg ha-1. Recommended doses of N, P, K and S fertilizers were added to all plots and they were used in the form of urea, TSP, MoP and gypsum, respectively. Addition of Zn had significant effect on the grain and straw yields of BRRI dhan49. Application of ZnO at 3 kg ha-1 (T 4) produced the highest grain (5294 kg ha-1) and straw (6567 kg ha-1) yields. The control treatment (Zn0) produced the lowest grain (3183 kg ha-1) and straw (3614 kg ha-1) yields. The other plant parameters such as panicle length, tillers hill-1 and grains panicle-1 , but not plant height and 1000-grain weight were also influenced significantly by the application of zinc. Zn concentration and uptake by BRRI dhan49 were also influenced by the addition of Zn. The total Zn uptake by the BRRI dhan49 varied from 173 g ha-1 in control to 353 g ha-1 in T 4. Thus, results suggest that application of ZnO @ 3 kg ha-1 along with NPKS at recommended rates needs to be applied for achieving higher yield of aman rice in Old Brahmaputra Floodplain Soil.
Effect of Soil Application of Zinc on Growth, Yield and Zinc Concentration in Rice Varieties
European Journal of Agriculture and Food Sciences, 2021
Zinc (Zn) deficiency is widespread nutrient disorder in lowland rice growing areas in Asia, especially in Bangladesh. Intensive cropping with modern varieties causes depletion of inherent nutrient reserves in soils. The application of Zn fertilizers results in higher crop productivity and increases Zn concentration in crops. A field experiment was conducted to evaluate the effect of Zn application on growth, yield, and grain-Zn concentration in eight varieties of rice. The experiment was laid out in a split plot design with a distribution of Zn rates (0 kg ha-1 and 3 kg ha-1 from ZnO) to the main plots and rice varieties (BRRI dhan49, BRRI dhan52, BRRI dhan56, BRRI dhan57, Kalizira, Biroin, Gainja and Khirshapath) to the sub-plots. Zinc application improved effective tillers hill-1, grains panicle-1 and 1000-grain weight which impacted the grain yield of rice. Among the eight rice varieties, a significant increase of grain yield was recorded in BRRI dhan49, BRRI dhan52, BRRI dhan56 ...
Background Soil incorporation of cereal straw to avoid burning and air pollution may influence the availability of Zn, a critical micronutrient in cereal production. Field experiment was carried out to evaluate the effect of zinc sulphate application and the cyclic incorporation of cereal straw on the yields, tissue concentration and uptake of Zn by rice and wheat crops and availability of Zn in soil. Results Application of 25 kg ZnSO 4 ha -1 to I year rice crop increased the grain yields of rice by 24.3 and 56.3 % over control during I and II year, respectively. Application of 25 kg ZnSO 4 ha -1 to I year rice crop ? cyclic incorporation of 1.5 t straw ha -1 increased the grain yields of rice by 21.4 and 87.4 % over control during I and II year, respectively. In I year, the grain yield of wheat crop was not significantly influenced by the different treatments while in II year the highest wheat grain yield was recorded with 25 kg ZnSO 4 ha -1 to I year rice crop ? cyclic incorporation of 6.0 t cereal straw ha -1 . Application of 25 kg ZnSO 4 ha -1 to I year rice ? cyclic incorporation of 1.5 t straw ha -1 resulted in a significant increase in the concentration of Zn in the plant tissues of both rice and wheat crops. The cyclic incorporation of 1.5-3.0 t cereal straw ha -1 maintained better availability of ZnSO 4 applied to I year rice crop to the subsequently grown crops. Conclusion Soil application of 25 kg ZnSO 4 along with incorporation of 1.5 t cereal straw ha -1 prior to I year rice transplanting followed by cyclic incorporation of cereal straw in subsequent crops ensures higher availability of Zn in soil and higher yields in rice-wheat rotation.
2020
An investigation was carried out on permanent plots at IGKV, Raipur research farm during kharif 2019 in order to conduct experiment entitled” “Evaluation of zinc fractions as influenced by long term fertilization under rice-wheat cropping system”. ”Ten treatments for this study comprised no fertilizer “control,50% NPK, 100% NPK, 150% NPK and (NPK) combined with ZnSO4 (100% NPK + ZnSO4 @ 10kg ha-1), 100% NP, 100% N, 100% NPK + FYM @ 5t ha-1, 50% NPK + BGA @ 10 kg ha-1 and green manure (50% NPK + GM @ 40kg h-1), laid out at randomized complete block design with four replications.” The different form of zinc fractions were analyzed at surface (0-15 cm) and subsurface (15-30 cm) soil, respectively. Among “various forms of zinc fractions namely, water soluble plus exchangeable Zn (WSEX-Zn), organically bound Zn (Org-Zn), amorphous sesquioxide bound Zn (AMOX-Zn), crystalline sesquioxide bound Zn (CRYOX-Zn), residual Zn and total Zn.” The data on zinc fractions revealed that the continuous...
EFFECT OF ZINC ON N, P, K AND Zn CONCENTRATION, UPTAKE, AND Zn EFFICIENCY IN RICE
Octa Journal of Biosciences , 2019
An experiment was carried out in Gazipur, Bangladesh to investigate the response of agronomical, physiological, apparent recovery, utilization zinc use efficiency, zinc concentration in endosperm and yield of rice to zinc. The design of experiment was Randomized Complete Block with three replications included zinc fertilizer level (0, 10 and 20 kg Zn ha-1 as H2O5SZn) and three rice varieties BRRIdhan56, BRRIdhan57 and BRRIdhan62. 10 kg Zn ha-1significantly increased the yield and yield contributing characters in BRRIdhan56 and BRRIdhan57 and 20 kg Zn ha-1 in BRRI dhan 62.The highest Zn content in endosperm (39.85 ppm) was recorded at 20 kg Zn ha-1 in BRRIdhan62 and the lowest (16.27 ppm) at 0 kg Zn ha-1 in BRRIdhan57. The highest agronomic, physiological, apparent recovery and utilization efficiency were recorded at 10 kg Znha-1 and the lowest at 20 kg Znha-1. It was revealed that the rice varieties BRRIdhan56, BRRIdhan57 responded to the application of 10 kg Zn ha-1, while BRRIdhan62 to 20 kg Znha-1. So, to obtain the highest yield to ensure satisfactory zinc content in BRRIdhan56, BRRIdhan57 with the most zinc use efficiency and avoid of environmental pollution, use of 10 kg Znha-1 while 20 kg Zn ha-1 toBRRIdhan62.
International Journal of Chemical Studies, 2017
Field experiments were conducted in the major rice growing tracts having varied soil Zn status to study the effect of Zn fertilization in irrigated rice. The treatments consisted of six levels of Zn (0 1.25, 2.50, 5.00, 7.50 and 10.0 kg ha) in a Randomized block design. The results revealed that the growth and yield were higher in location 4 where the soil Zn content was minimum (0.87 mg kg ), compared to locations 6 to 12 where the soil Zn content was comparatively high (0.98 to 2.99 mg kg ). Averaged for all locations, the application of Zn @ 7.5 kg ha recorded significantly the highest yield of grain (6.81 t ha) and straw (8.09 t ha). Hence, application of Zn significantly increased the growth and yield of rice in Zn deficient soils, while higher Zn levels showed a decline or no response in soils having high zinc status.
The Indian Journal of Agricultural Sciences
Based on our findings, it can be concluded that application of Zn in transplanted rice is essential to harvest profitable yield under acidic soils of NEH region of India. Combined application (soil and foliar) was more effective instead of soil or foliar application alone. Successive yield increment of rice was noticed up to the application of Zn 7.5 kg/ha + foliar spray of Zn @0.5% at panicle initiation and booting stages. Thereafter productivity of rice slightly declined with increases of Zn doses in acidic soils. The application Zn @7.5 kg/ha + foliar spray of Zn @0.5% significantly improved yield attributing parameters of rice over control. Among the Zn nutrition treatments, application of Zn @7.5 kg/ha + foliar spray of Zn @0.5% registered 4.5% higher grain yield over its soil application. With regards to the soil biological properties successive increase of Zn doses improved the soil biological properties up to the application of Zn @10 kg/ha + foliar spray of Zn @0.5%. Howeve...
Effect of Zn and S Interaction on Soil Properties and Yield of Rice (Oryza sativa L)
International Journal of Scientific and Research Publications (IJSRP), 2020
A field experiment was conducted during Kharif season of 2018 on research plot of Udai Pratap (Autonomous) College, Varanasi (U.P.) adjoining the Department of Agricultural Chemistry and Soil Science. The physicochemical properties of the experimental soil were ; pH (7.65), EC (0.26 dS m-1); organic carbon (0.58%), available nitrogen (258.5 kg ha-1), available phosphorus (12.6 kg ha-1), available potassium (165 kg ha-1),available sulphur (9.4 kg ha-1) and available (DTPA extract) zinc (2.17 ppm). The experiment was carried out in randomized block design (RBD) with three replications and following six treatments: T 0 = Control (RDF) T 1 = RDF + Zinc @ 20 kg ha-1 ,T 2 = RDF + Sulphur @ 40 kg ha-1 , T 3 = RDF + Zinc @ 20 kg ha-1 + Sulphur @ 60 kg ha-1 ,T 4 = RDF + Zinc @ 25 kg ha-1 + Sulphur @ 40 kg ha-1 , T 5 = RDF + Zinc @ 30 kg ha-1 + Sulphur @ 30 kg ha-1. Application of Zn and S significantly affected the growth parameters (plant height and tillers) of rice. Plant height and number of tillers significantly increased over without Zn and S. Maximum was registered with T 4 (Zn @ 25 kg ha-1 + S @ 40 kg ha-1). Grain and straw yields were also significantly increased by the different treatments and highest yields were registered with T 4 .The minimum concentration of Zn and S were registered with treatment T 0 and the maximum in T 4 (Zn @ 25 kg ha-1 + S @ 40 kg ha-1).The application of Zn and S increased the availability of the nutrients (N, P, K, S and Zn) in the post harvest soil. It can be concluded from the present study that adequate Zn and S availability during entire cultivation period is important for good rice growth and yields.