Fertilizer release kinetics incorporated to torrefied banana-crop residues

An understanding of the mineralization process of organic amendments in soil is required to synchronize N release with crop demand and protect the environment from excess N accumulation. Therefore, we conducted a laboratory incubation experiment to assess nitrogen mineralization potential of crop residues (rice and wheat straw) and organic manures (poultry manure, farmyard manure, cowpea and sesbania) in two benchmark soils (Typic Haplustept and Typic Ustifluvents) of semi-arid region of Punjab, India, varying in textureat field capacity moisture level at a constant temperature of 331°C. Mineralization was faster during first 7 days of incubation in Typic Haplustept and upto 14 days in Typic Ustifluvents which subsequently declined over time. In both soils, net N mineralization continued to increase with increasing period of incubation (expect with crop residues) and was significantly higher in Typic Ustifluvents (54-231µg g-1) than Typic Haplustept (33-203 µg g-1). Compared to unamended soils, percent N mineralized was highest is sesbania (35-40 %) followed by cowpea (32-37 %) and least in wheat (10-11 %) after 42 days of incubation. Thus, sesbania and cowpea may preferably be used to meetthe large N demand during early period of plant growth. Further, mineralization rate constants (k) also indicated that availability of mineral N was significantly higher with application of organic amendments than unamended control treatments in both soils. Therefore, it may be concluded that considerable economy in the use of inorganic N fertilizer can be employed if N mineralization potential of organic inputs is taken into consideration.

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Potassium chloride: impacts on soil microbial activity and nitrogen mineralization

Ciência Rural ◽

10.1590/0103-8478cr20180556 ◽

2019 ◽

Vol 49 (5) ◽

Author(s):

David Gabriel Campos Pereira ◽

Isadora Alves Santana ◽

Marcio Mahmoud Megda ◽

Michele Xavier Vieira Megda

Keyword(s):

Potassium Chloride ◽

Microbial Activity ◽

Crop Residues ◽

Initial Period ◽

Chloride Content ◽

Soil Microbial Activity ◽

Soil Microbial ◽

Continuous Use ◽

Banana Crop ◽

Soil Chloride

ABSTRACT: Potassium chloride is the most widely used potassium source worldwide, and due to its continuous use, the accumulation of its salts in the soil and in plants is becoming more common. Excess available ions can cause a series of physiological disturbances in organisms and can become a biocide in the soil. The objective of this study was to evaluate the effects of the application of KCl and banana crop residues on soil chloride content, microbial activity, and soil ammonification. The experiment utilized a completely randomized 2 × 4 factorial design with four replicates. Treatments were as follows: two doses of vegetal residue (200 and 400 mg dm-3) × four doses of KCl (0, 167, 334, and 668 mg dm-3 of KCl) and a control (untreated soil). The CO2 emission, ammonium (N-NH4 +) and soil chloride (Cl-) content, and mineralization/immobilization rates of the soils in each treatment were measured 4, 45, and 130 days after incubation (dai). Higher KCl dosages reduced soil microbial activity at 4 dai, regardless of the residue dosage. Microbial activity was reduced at 130 dai in all treatments when compared to the initial period. Higher dosages of banana crop residues increased the Cl- content of the soil and promoted the immobilization of N-NH4 +. We concluded that dosages of KCl (above 400 mg dm-3), when applied to soils that already contain crop residues, reduce microbial activity and mineralization of N in the soil.

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Distribution, timing of attack, and oviposition of the banana weevil, Cosmopolites sordidus, on banana crop residues in Uganda

Entomologia Experimentalis et Applicata ◽

10.1111/j.1570-7458.2005.00340.x ◽

2005 ◽

Vol 117 (2) ◽

pp. 119-126 ◽

Cited By ~ 4

Author(s):

M. Masanza ◽

C.S. Gold ◽

A. Huis

Keyword(s):

Crop Residues ◽

Cosmopolites Sordidus ◽

Banana Weevil ◽

Banana Crop

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Potassium balance and release kinetics of non-exchangeable K in a Typic Haplustert as influenced by cattle manure application under a soybean-wheat system

Soil Research ◽

10.1071/sr00064 ◽

2002 ◽

Vol 40 (3) ◽

pp. 533 ◽

Cited By ~ 18

Author(s):

Muneshwar Singh ◽

A. K. Tripathi ◽

D. Damodar Reddy

Keyword(s):

Crop Residues ◽

Release Kinetics ◽

Cattle Manure ◽

Continuous Cropping ◽

Exchangeable K ◽

Potassium Balance ◽

Negative Balance ◽

Kinetics Of ◽

Best Fit ◽

K Release

Potassium balance and non-exchangeable potassium release in 0.01 M CaCl2 medium in a Typic Haplustert were studied in a 7-year-old soybean–wheat rotational experiment involving 4 levels of cattle manure along with the recommended dose of K (66 kg/ha.year). Continuous cropping without returning crop residues to the soil led to a negative balance of 66–107 kg K/ha.year. Manuring at the rate of 4 and 8 t/ha did not significantly change the negative balance, but application of 16 t/ha manure reduced the negative K balance. Continuous cropping without cattle manure reduced cumulative K release from 236 mg/kg (initial) to 195 mg/kg. Application of manure at 4, 8, and 16 t/ha kept K release at 229, 245, and 246 mg/kg soil, respectively. A parabolic diffusion equation was the best fit to describe K release. Cropping under the present level of K input resulted in a decline in non-exchangeable K whatever the addition of manure. Manuring at 4 and 8 t/ha has accelerated the mining of native K, which increased the unsustainability of the system. K balance, non-exchangeable K release kinetics, soybean–wheat rotation, cattle manure, Typic Haplustert.

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Intake and digestibility of lamb fed diets containing banana crop residues

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2018000200008 ◽

2018 ◽

Vol 53 (2) ◽

pp. 197-205 ◽

Cited By ~ 2

Author(s):

Tânia Dayana do Carmo ◽

Paula Miranda Barbosa ◽

Luciana Castro Geraseev ◽

Diego Santana Costa ◽

Geziana Moreira Seles ◽

...

Keyword(s):

Crude Protein ◽

Crop Residues ◽

Short Chain Fatty Acids ◽

Nutrient Digestibility ◽

Neutral Detergent Fiber ◽

Short Chain ◽

Fatty Acid Production ◽

Total Carbohydrates ◽

Banana Leaf ◽

Banana Crop

Abstract: The objective of this work was to evaluate the effects of the inclusion of banana leaf or pseudostem hay in complete diets on the intake, nutrient digestibility, and ruminal short-chain fatty acid production by lambs. A total of 30 Santa Inês x Dorper lambs were allocated to five treatments: 400 g kg-1 Cynodon spp. hay; 200 g kg-1 banana leaf hay + 200 g kg-1 Cynodon spp. hay; 400 g kg-1 banana leaf hay; and 200 g kg-1 banana pseudostem hay + 200 g kg-1 Cynodon spp. hay and 400 g kg-1 banana pseudostem hay. The inclusion of banana crop residues had no effect on dry matter intake, organic matter, crude protein, neutral detergent fiber (NDF), acid detergent fiber, non-fiber carbohydrates, and total carbohydrates, which presented averages of 1,086.8, 1,000.1, 182.7, 374.3, 194.7, 390.2, and 771.6 g per day, respectively. There was a reduction in NDF digestibility with the inclusion of 400 g kg-1 leaf hay, but no differences were observed in the other treatments. The addition of both banana leaf and pseudostem hay can replace Cynodon spp. hay without affecting intake, nutrient digestibility, and ruminal concentration of short-chain fatty acids.

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