Improved Corn Yields When Humic Acid Extracted from Composted Manure Is Applied to Acid Soils with Phosphorus Fertilizer (original) (raw)
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Environment, Biodiversity and Soil Security, 2020
G ROWING maize in calcareous soils requires adequate supply of phosphorus inputs, yet excessive P-applications may affect negatively micronutrients availability in soil, including Zn. Thus, the current study evaluates the ability of humic acid (HA) to counteract the negative effects of applied P on Zn-uptake by maize plants. To achieve this aim, a field experiment was conducted in a calcareous soil (CaCO 3 =268.91 g kg-1) following a split plot design to study the interactions between different P-inputs (100, 125 and 150% of the recommended dose, applied in main plots) and available-Zn in presence and absence of HA (applied in sub-plots at either 2 or 4 kg HA ha-1). Results revealed that increasing the level of P-application raised significantly P availability and consequently its uptake by maize plants; thus, enhanced significantly plant growth parameters and grain yield. In this concern, 125% of the recommended P-dose recorded the highest partial factor productivity values. Likewise, application of HA raised significantly available-P content and improved considerably plant growth and grain yield, especially with increasing the rate of its application. On the other hand, increasing the level of P-fertilizers decreased significantly Zn-availability and uptake by plants; however, in presence of HA, this effect was counteracted. Although, this amendment recorded no significant effect on soil-Zn availability; however, it raised significantly its content in shoots but not in grains. In conclusion, HA improved significantly the productivity of maize grown on a calcareous soil. This amendment not only improved the partial factor productivity of P-fertilizer, but also increased Zn-uptake by maize plants.
Ilmu Pertanian (Agricultural Science), 2019
The main constraint in the extensification of maize on the dry land of acid soil is the low availability of P in soil. This study aimed to determine the effect and the optimal dose of humic acid on the growth and yield of maize on acid soil. This research was conducted from February to May 2017 at Tri Dharma Field Laboratory, Faculty of Agriculture, Gadjah Mada University. Acid soil with low P availability used was from sub-district Cigudeg and Jasinga, West Java. The research was arranged in Randomized Complete Block Design (RCBD) with 2 factors. The first factor was maize cultivar, namely Bisi 2 and Pioneer 35. The second factor was the rate of humic acid and NPK fertilizer, consisting of 0 kg.ha-1 (without) NPK and 0% (without) humic acid, NPK + 0% (without) humic acid, NPK + 5% humic acid, NPK + 10% humic acid, and NPK + 15% humic acid. NPK fertilizer applied was NPK 16:16:16 at a dose of 350 kg.ha-1. The results showed that humic acid application on acid soil increased C-humic ...
Phosphorus unavailability and lack of organic matter in the soils under semiarid condition are the major reasons for low crop productivity. Field trial was conducted to investigate the impact of different animal manures (poultry, cattle, and sheep manures) and phosphorus levels (40, 80, 120, and 160 kg P 2 O 5 ha −1) on yield and yield components of hybrid maize (CS-200) with (+) and without (−) phosphate-solubilizing bacteria (PSB) seed treatment at the Agronomy Research Farm of The University of Agriculture Peshawar, during summer 2014. Our results confirmed that the application of poultry manure significantly (P ≤ 0.05) increased yield and yield components of maize. Phosphorus applied at the rate of 120 kg P 2 O 5 ha −1 increased ear length, grains ear −1 , and shelling percentage, while the highest rate of 160 kg P ha −1 increased grains weight, grain yield, and harvest index. Maize seeds treated with PSB (+) before sowing had produced higher yield and yield components than untreated seeds (−). We concluded from this study that com‐ bined application of 160 kg P 2 O 5 ha −1 + poultry manure and seed treatment with PSB (+) could improve crop productivity and profitability under semiarid condition.
Humic acid and nitrogen dose application in corn crop under alkaline soil conditions
Revista Brasileira de Engenharia Agrícola e Ambiental, 2021
Humic acid (HA), as a bio-stimulant and a major component of organic matter (OM), can improve plant physiology, soil fertility, and nutrient availability, mainly in low OM soils. Nitrogen (N) is one of the most important nutrients that affect several metabolic and biochemical activities, leading to improved plant development. This study was conducted to investigate the combined effect of HA and N doses on soil organic matter (SOM) and total N concentration, N uptake, corn growth, and grain yield under conventional tillage at Peshawar, Pakistan. Treatments were tested in a randomized block design with four replicates arranged in a factorial scheme 3 × 4 + 1. The respective doses of HA (1.5, 3,0 and 4.5 kg ha-1) were applied at the corn sowing, whereas N doses (80, 120, 160, and 200 kg ha-1) were applied in three splits (1/3 at sowing, 1/3 at the V5 stage, and remaining 1/3 at the tasselling stage) with one control (no HA and N). The application of HA, regardless of the applied doses,...
Pure and Applied Biology, 2015
The cheaper rock phosphate (RP) could replace the commercial phosphatic fertilizer with pronounced advantages provided if the solubility and release of P form RP is enhanced through addition of some organic amendments. Combined application of RP with organic materials to soil reduces the dependence on chemical fertilizers and maintains higher levels of P in soil solution for a longer period than the fertilizer alone. Thus the present field study was conducted to investigate the effect of RP treated with farmyard manure (FYM), humic acid (HA) and effective microbes (EM) on the yield and uptake of P by wheat in marginal P calcareous alkaline soil during rabi 2011-12. The treatments was control (T1), 90 kg P2O5 ha-1 as single super phosphate (T2), 90 kg P2O5 ha-1 as RP (T3), RP+ 10 t FYM ha-1 (T4), RP+ 5 kg HA ha-1 (T5), RP+EM (T6), RP+HA+EM (T7), RP+FYM+EM (T8) and RP+FYM+HA+EM (T9) were arranged in a Randomized Complete Block (RCB) design with three replications. The SSP, RP and FYM was applied on soil surface; humic acid was first mixed with the sand and then applied whereas EM was first activated and then applied through spray on the soil surface at 200 L ha-1. After thorough mixing of treatments with soil, the wheat seeds cv. Atta Habib were sown in lines spacing 25 cm apart through seed drill with seed rate of 120 kg ha-1. The results showed that the application of RP alone significantly increased the grain yield from 3.74 in control to 4.42 t ha-1. This effect of RP was further enhanced when combined with FYM, HA, or EM and produced 4.98, 4.6 and 4.8 t grain yield ha-1 , respectively suggesting improvement in P solubility. Among the amendments, FYM was superior to HA or EM but combining HA or EM with mixture of RP+FYM further enhanced the beneficial effect of RP. When RP was applied with FYM+HA+EM the grain yield jumped to the maximum (5.2 t ha-1) which was statistically which was almost double of SSP fertilizer. The tissue leaf N and grain N and P also significantly improved with application of RP in combination with the said amendments. Similarly the soil N and AB-DTPA extractable P also showed significant improvement with combined application of RP with FYM, HA and EM. The combination of RP+FYM+HA+EM which had the maximum yield with 2 times higher VCR than SSP and had higher tissue P at anthsis and in soil at boot and after harvesting of crop stages of the crop could be the optimum choice under the prevailing soil and climatic conditions.
Optimization of phosphorus (P) fertilizer for mungbean (Vigna radiata) was studied during kharif 2012 through integrated use of humic acid (HA), chemical fertilizers and biofertilizer viz., plant growth promoting rhizobacteria (PGPR) at NARC. The plots were arranged in split-split design under three factors (HA, P levels and PGPR inoculation). Results indicated that application of HA at 50 kg ha -1 along with 45 kg ha -1 P 2 O 5 (75% P) in presence of PGPR inoculation recorded the highest grain yield (1.96 t ha -1) that is 19% more than the treatment receiving 100% P application alone (no HA and PGPR). The highest concentration of P (0.3 %) and N (3.5%) in whole shoot mung bean were observed in the treatment where HA was applied at 50 kg ha -1 along with 60 kg ha -1 P 2 O 5 (100% P) and PGPR inoculation. However mungbean yield and P concentration was statistically at par with the treatment where P was applied at 75% of recommended rate along with H.A and PGPR. Based on findings of t...
Journal of Soil Science and Plant Nutrition, 2020
The present study aims to enhance the morpho-phsyiological traits, effective utilization of phosphorus and potassium, nutritional quality, and maize productivity using combinations of inorganic and organic amendments in alkaline calcareous soil. The inorganic fertilizers were applied as control (PK 0), recommended PK (PK R), and 75% of PK R (PK R75) either alone or in combination with different composts; university compost (UC), NIAB compost (NC) and vermicompost (VC), and organic acids; citric acid (CA) and oxalic acid (OA). The results indicated a significant effect of treatments on morpho-physiological and biochemical attributes of maize during crop growth. Stomatal conductance (g s) and transpiration rate (E) increased up to 93% and 139%, respectively, over control when PK R75 was applied with NC + CA. While, photosynthesis and chlorophyll contents were maximum at PK R75 along with UC + CA. The PK R along with UC + CA increased grain yield (108%) and biological yield (98%) over control. Moreover, the respective treatment increased P content in straw and grain up to 100% and 122% over control (P content: 0.08 and 0.18%), respectively, while 14.3 and 21.2% higher over PK R treatment (0.14 and 0.33%), respectively. The maximum K accumulation in maize grains was noted with PK R combined with NC + CA which was further confirmed with principle component analysis. The results clearly suggest integrated use of mineral PK fertilizers along with composts and organic acids could be an effective strategy to increase P and K supply, and enhance qualitative and quantitative parameters of maize grown on calcareous soil.
Journal of Experimental Agriculture International
Soil fertility loss due to soil acidity is a major constraint for crop production in western Ethiopia. A study was conducted in the acidic soil of Assosa for two main growing seasons (2014 and 2015) to assess the effect of integrated application of compost, lime and phosphorus on selected properties of soil and P use efficiency of maize. The treatments were factorial combinations of compost (0 and 5 t ha-1), lime (0, 1.5 and 3 t ha-1) and phosphorus (0, 20 and 40 kg P ha-1) in randomized complete block design with three replications. The combined analysis of the two season data showed, significant (P<0.01) interaction effects of season with compost and season with P on soil pH; compost with P; and lime with P on apparent P recovery and utilization efficiency; season, lime and P on exchangeable acidity; and interactions of season, compost, lime and phosphorus on the available P. The highest soil pH (6.23) was observed due to compost (5 t ha-1) in the first season (2014) and the highest reduction in exchangeable Al (0.05 cmol c kg-1) was due to lime (3 t ha-1) in
European Journal of Experimental Biology, 2018
Use of inorganic fertilizers have some problems to farmers in terms of high cost and short residual effect. Since use of organic fertilizers have a long residual effect but the nutrient requirement of crops is not fulfill in one season. So, using of combination of different organic manures can not only improve soil properties but also fulfill the nutrients requirement of crops. Therefore, a study was carried out aiming use of combinations of organic manures to improve maize yield and quality at the Cereal Crops Research Institute (CCRI), Pirsabak District Nowshera, KP, Pakistan during Kharif 2016. Poultry Manure (PM) and Humic Acid (HA) combinations were used as treatments including T1=Control, T2=2.5 tons PM ha-1 +5 kg HA ha-1 , T3=5 tons PM ha-1 +4 kg HA ha-1 , T4=7.5 tons PM ha-1 +3 kg HA ha-1 , T5=10 tons PM ha-1 +2 kg HA ha-1 and T6=12.5 tons PM ha-1 +1 kg HA ha-1. A basic dose of NPK was applied at the rate of 60:40:30 kg N, P and K ha-1. The results showed that highest days number to tasseling (55) and to silking (56) were recorded when PM and HA were applied at the rate of 12.5 tons PM ha-1 +1 kg HA ha-1 as compared with control plots. Highest plant height (185.33 cm), leaf area (411.26 cm 2), cob length (17.0 cm), grains number cob-1 (413), grain yield (4783.3 kg ha-1), 1000 grain weight (413 g) and stover yield (13197 kg ha-1) were produced when PM and HA were applied at the rate of 12.5 tons PM ha-1 and 1 kg HA ha-1 as compared with the control plots. It is recommended that use of HA and PM in blending not only improves crop yield but also has a long term residual effect and improve soil properties as well.