Effect of nitrogen and zinc fertilization on zinc and iron bioavailability and chemical speciation in maize silage

Trade-offs in dry matter (DM) and metabolisable energy (ME) between combinations of three maize silage hybrids varying in maturity from 100-113 CRM and six winter forage options were investigated in a Waikato farmer's field over 2 years. Winter crops were triticale, cut once; oats grazed 1-2 times; and Tama and Feast II Italian ryegrass, each cut or grazed 2-3 times. Greatest DM and ME production (38.9 t/ha; 396 GJ/ha) was from a 113 CRM hybrid followed by a single-cut triticale crop. The most economical sources of DM and ME were obtained from a 100 CRM maize hybrid plus grazed oats (11.8 c/ kg; 1.12 c/MJ), while the cheapest ME source among cut winter forages was a 113 CRM maize hybrid + triticale (1.18 c/MJ). Reliable annual silage production of 30 t DM/ha and 330 GJ ME/ha (or 3000 kg MS/ha) is possible using a late maturing maize hybrid combined with a winter forage crop such as triticale, although the low feed value of the triticale may limit its use as feed for milking cows. Keywords: Italian ryegrass, oats, maize silage, supplements, triticale, winter forage crops

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Assessment of Chemical Speciation and Condition for Magnesium Ammonium Phosphate Precipitation from Swine Effluent by Computer Program

International Conference on Agricultural, Environmental and Biological Sciences (AEBS-2014) April 24-25, 2014 Phuket (Thailand) ◽

10.15242/iicbe.c414044 ◽

2014 ◽

Keyword(s):

Computer Program ◽

Chemical Speciation ◽

Ammonium Phosphate ◽

Magnesium Ammonium Phosphate ◽

Swine Effluent ◽

Magnesium Ammonium

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Chemical speciation of binary complexes of L-valine with Co(II), Ni(II) and Cu(II) in propylene glycol–water mixtures

Chemical Speciation and Bioavailability ◽

10.3184/095422913x13585309614370 ◽

2013 ◽

Vol 25 (1) ◽

pp. 57-62

Author(s):

Peketi Bhushanavathi ◽

Boddu Veeraswami ◽

Uppuleti Viplavaprasad ◽

Gollapalli Nageswara Rao

Keyword(s):

Propylene Glycol ◽

Chemical Speciation ◽

Binary Complexes

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Evolving appropriate zinc fertilization strategy for rice-rice (Oryza sativa) cropping system in Cauvery Delta Zone

ORYZA- An International Journal on Rice ◽

10.35709/ory.2019.56.3.5 ◽

2019 ◽

Vol 56 (3) ◽

pp. 294-304

Author(s):

C Sharmila Rahale

Keyword(s):

Oryza Sativa ◽

Tamil Nadu ◽

Field Experiments ◽

Foliar Spray ◽

Cropping System ◽

Green Leaf ◽

Farm Yard Manure ◽

Zinc Fertilization ◽

Initiation Stage ◽

Cauvery Delta

Six field experiments were conducted at Tamil Nadu Rice Research Institute, Aduthurai to evolve suitable zinc fertilization method for rice - rice (Oryza sativa L.) cropping system in Cauvery delta zone. The treatment includes: T1 : Control, T2 : 100 g zinc sulphate (ZnSO4)/cent in nursery alone., T3 : root dipping alone in 2 % zinc oxide (ZnO) solution, T4 : 25 kg ZnSO4 ha-1, T5 : 37.5 kg ZnSO4 ha-1, T6 : 25 kg ZnSO4 ha-1+ Farm Yard Manure (FYM) 12.5 t ha-1, T7 : 25 kg ZnSO4 ha-1 + Green Leaf Manure (GLM) 6.5 t ha-1, T8 : Tamil Nadu Agricultural University Micro Nutrient (TNAU MN) mixture 25 kg ha-1 as Enriched Farm Yard Manure (EFYM), T9 : TNAU MN mixture 37.5 kg ha-1 as EFYM, T10 : Foliar spray of 0.5% ZnSO4 + 1 % urea at tillering and panicle initiation stage, T11 : 100g ZnSO4 /cent in nursery alone + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T2+ T10), T12 : root dipping alone in 2 % ZnO solution + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T3 + T10), T13: 100 g ZnSO4 /cent in nursery alone + root dipping alone in 2 % ZnO solution + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T2 + T3 + T10). The treatments T5, T6, T7 and T9 were skipped in rabi season to know the residual effect of these treatments in the subsequent season. Among the treatment combinations, application of 25 kg ZnSO4 ha-1 + FYM 12.5 t ha-1 recorded higher grain yield in both kharif (6232 kg ha-1) and rabi (6236 kg ha-1) seasons. The same treatment combination recorded higher Zn content and Zn uptake as well. Regarding soil nutrient content, the same treatment recorded higher N, P and K content. This treatment was followed by application of 25 kg ZnSO4 ha-1 + green leaf manure 6.5 t ha-1. The experimental findings suggested that combination of organic and inorganic sources not only increased the yield but also improves soil health in Cauvery delta zone.

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