Effect of Phosphorus-Zinc (P-ZN) Interaction in Calcareous Torrifluvent Soil on Wheat (Triticum Astevum L.) Yield (original) (raw)
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Evaluation of Phosphorus and Zinc Interaction Effects on Wheat Grown in Saline-Sodic Soil
Pakistan Journal of Agricultural Sciences, 2017
The essentiality of phosphorus (P) as a macronutrient and that of zinc (Zn) as micronutrient for plants has been established long ago but their interactive effects on economic yield of crops are still controversial particularly in calcareous saline-sodic soils. Therefore, a pot experiment was conducted to evaluate the P-Zn interaction effects on wheat in saline-sodic soil. The treatments comprised of four levels of P (0, 25, 50 and 75 mg kg-1 soil) and three levels of Zn (0, 5 and 10 mg kg-1 soil) arranged in completely randomized design each with three replications. The results showed that total number of tillers, plant height, straw dry weight and 1000-grain weight was significantly (P ≤ 0.05) higher in saline-sodic control closely followed by applied P at 75 mg kg-1 soil + Zn at 5 mg kg-1 soil (P 75 Zn 5). While maximum Zn concentration in wheat straw and grains was observed in P 75 Zn 5. The maximum ammonium-bicarbonate-diethylene-triamine-penta-acetic acid (AB-DTPA) extractable P and Zn in post-experiment soil was recorded with P at 75 mg kg-1 soil + Zn at 10 mg kg-1 soil (P 75 Zn 10). Thus, application of P at 75 mg kg-1 soil along with Zn 5 mg kg-1 soil was the appropriate combination of P and Zn for substantial increase in growth and yield of wheat in saline-sodic soil.
African Journal of Biotechnology, 2010
Zinc (Zn) deficiency is a worldwide nutritional problem resulting in significant reduction in crop yields. It is often observed in calcareous soils and also after heavy doses of phosphorus (P) fertiliser applications, the latter being termed P-induced Zn deficiency. For management purposes, it is important to understand how crops with different root architecture would respond to P-induced Zn deficiency. This glasshouse study was aimed at determining the effects of increased P application on shoot dry matter, shoot P and Zn concentration in wheat and maize grown in a calcareous soil supplied with five rates of P (0, 30, 60, 90 and 120 mg kg-1 soil). Compared to the control treatment, increasing soil P supply increased shoot P concentration (2.7-3.0 fold), while decreased shoot dry matter (10 and 23%) and shoot Zn concentration (75 and 82%) (wheat and maize, respectively). In wheat, the reduction in shoot dry matter was associated with Zn concentrations below the critical level indicating P-induced Zn deficiency as being the main cause of reduced shoot growth. In maize, the reduction in shoot dry matter was accompanied by higher than adequate shoot P concentrations and lower than adequate shoot Zn concentrations suggesting P toxicity and Zn deficiency as the main contributing factors for reduced shoot growth. The results suggest that heavy applications of P fertilizers can induce not only Zn deficiency but also P toxicity depending on the crops thus P application rates should be chosen carefully.
African Journal of Biotechnology, 2010
Zinc (Zn) deficiency is a worldwide nutritional problem resulting in significant reduction in crop yields. It is often observed in calcareous soils and also after heavy doses of phosphorus (P) fertiliser applications, the latter being termed P-induced Zn deficiency. For management purposes, it is important to understand how crops with different root architecture would respond to P-induced Zn deficiency. This glasshouse study was aimed at determining the effects of increased P application on shoot dry matter, shoot P and Zn concentration in wheat and maize grown in a calcareous soil supplied with five rates of P (0, 30, 60, 90 and 120 mg kg-1 soil). Compared to the control treatment, increasing soil P supply increased shoot P concentration (2.7-3.0 fold), while decreased shoot dry matter (10 and 23%) and shoot Zn concentration (75 and 82%) (wheat and maize, respectively). In wheat, the reduction in shoot dry matter was associated with Zn concentrations below the critical level indicating P-induced Zn deficiency as being the main cause of reduced shoot growth. In maize, the reduction in shoot dry matter was accompanied by higher than adequate shoot P concentrations and lower than adequate shoot Zn concentrations suggesting P toxicity and Zn deficiency as the main contributing factors for reduced shoot growth. The results suggest that heavy applications of P fertilizers can induce not only Zn deficiency but also P toxicity depending on the crops thus P application rates should be chosen carefully.
Human bioavailable zinc (Zn) in cereal grains depends on contents of Zn and phosphorus (P) in grains because these two nutrients interact for their concentration in wheat grains. In the present study, a pot experiment was conducted to investigate the effect of various levels of P (0, 60 and 120 mg kg–1 soil) and Zn (0 and 6 mg kg–1 soil) on yield and grain Zn contents of four wheat cultivars i.e. Shafaq-2006, Auqab-2000, Pasban-90 and Pak-81. Grain yield of all tested wheat cultivars was increased by the application of Zn and P, but at variable rate. Calculations of deficiency stress factors for P and Zn confirmed higher demand of one nutrient at a higher application rate of the other nutrient. Concentration ratio of P to Zn in wheat grains was influenced by Zn application especially at higher rates of P application. Results showed that Zn application aiming at optimum grain yields and grain Zn concentration depends on genotypic variation in wheat cultivars and rate of P.
Eco. Env. & Cons. 28 (3) , 2022
Field studies were conducted during rabi season of 2014-15 to 2015-16 to at Crop Research Farm, Block E of SHUATS, Department of Agronomy, Naini Agricultural Institute, SHUATS, Prayagraj, to study effect of tillage implementations inorganic and organic nitrogen utilization and foliar applied zinc sulfate on wheat (Triticum aestivum L.) productivity and quality in the NEPZ. The experiment comprising two treatments in main plots (conventional and minimum tillage) in sub plots six organic and inorganic nitrogen management (viz., NU 0 ; Control, NU 1 ; 50% RDN through inorganic with 50% RDN through organic, NU 2 ; 25% RDN through inorganic with 75% RDN through organic, NU 3 ; 50% RDN through inorganic with 50% RDN through organic, NU 4 ; 25% RDN through inorganic with 75% RDN through vermicompost organic NU 5 ; 100% RDN through inorganic and sub plots viz., control and zinc,was laid out in split split plot design with three replications. Results revealed that significant and maximum (grain yield, 3.89 t/ha; number of leaves per plant, 17.25 and 18.12 at 75 and 90 DAS) respectively were recorded in crop cultivated by conventional tillage. Further, significantly the highest soil organic carbon (0.451%) was recorded in minimum tillage compare to conventional tillage. Significant and maximum yield and yield attributes (grain yield, 4.14 t/ ha; straw yield, 8.39 t/ha; plant height, 84.42 and 94.58 cm at 90 and 105 DAS; number of leaves per plant, 17.82 and 18.25 at 75 and growth attributes 105 DAS, respectively were recorded in applied nitrogen management NU 3 50% RDN through inorganic with 50% RDN through organic treatment. Based on teh pooled data significant maximum organic carbon (0.46%) Pore space (48.407 and 48.135% at depth 0-15 and 15-30 cm) were recorded in NU 4 , respectively. Further minimum value of soil pH (7.24), mm (4.56 ppm) Cu (0.53ppm), Bulk density 1.329 and 1.316 gcm 3 at 0-15 and 15-30cm), Particle density (2.517gcm-3 at 15-30 cm), respectively were recorded in NU 4 treatment. The foliar application of 0.5% zinc sulphate had pronounced effect on soil properties and crop performance of wheat under rainfed conditions.
Agronomy, 2021
Rice–wheat cropping system (RWCS) is considered as the furthermost vital system in the Indo-Gangetic Plains of South-Asia, including India, Pakistan, Bangladesh, and Nepal. Recently, the deficiency of micronutrients like zinc (Zn) has emerged as one of the prime limitations for the sustainability issues of this RWCS in Zn deficient calcareous soils, particularly in India, as a result of the calcareous typic ustifluvents taxonomic nature of the soils. Therefore, a new Zn fertilization approach for soils is very much needed in the intensive RWCS. Thus, a six-year-long investigation was designed with three different modes of Zn application, viz., the application of Zn only in the first year of study, application in alternative years, and application in every year. Four different rates of Zn applications in a hectare of area for a single year, viz., 2.5, 5.0, 7.5, and 10 kg ha−1 year−1, and times of Zn application, viz., only at first year, alternative years, and in each year. The major...
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.
Zinc Tolerance in Wheat Cultivars as Affected by Varying Levels of Phosphorus
Communications in Soil Science and Plant Analysis, 2006
The effect of zinc -phosphorus (Zn-P) interaction on Zn efficiency of six wheat cultivars was studied. The higher dry matter yields were observed when Zn was applied at 5 mg g 21 soil than with no Zn application. Phosphorus applications also increased dry matter yield up to the application of 25 mg P g 21 soil. The dry matter yield was significantly lower at the P rate of 250 mg g 21 soil. At the Zndeficient level, the Zn-efficient cultivars had higher Zn concentrations in the shoots. Zinc concentrations in all cultivars increased when the P level in the soil was increased from 0 to 25 mg P g 21 soil except for the cv. Durati, in which Zn concentrations decreased with increases in P levels. However, when Zn  P interactions were investigated, it was observed that at a Zn-deficient level, Zn concentrations in the plant shoot decreased with each higher level of P, and more severe Zn deficiency was observed at P level of 250 mg g 21 soil.