Tag Archives: nutrient content

1150–1158 E. Shalavina, A. Briukhanov and R. Uvarov
Effective application of mass balance method: case of organic fertiliser produced from pig slurry
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Effective application of mass balance method: case of organic fertiliser produced from pig slurry

E. Shalavina*, A. Briukhanov and R. Uvarov

Federal State Budgetary Scientific Institution “Federal Scientific Agroengineering Center VIM”, branch in Saint Petersburg, Department of Agroecological Engineering, Filtrovskoje shosse, 3, p.o. Tiarlevo, RU196625 Saint Petersburg, Russia
*Correspondence: shalavinaev@mail.ru

Abstract:

The study aimed to verify the applicability of the mass balance method in calculating quantity and quality of an organic fertiliser produced from unseparated pig slurry in a pig-fattening complex in the Leningrad Region. The amount of manure at ex-animal level and its nutrient content, required for further calculations of ex-housing manure and resulting organic fertiliser at ex-storage, were calculated by applied diets and feed DM digestibility. Calculated values were compared with the norms from relevant Russian regulatory documents. The regulatory values of manure nitrogen were 22% smaller than the calculated ones. On the contrary, the standard values of manure phosphorus and potassium exceeded the calculated ones by 72% and 73%, respectively. The nutrient content of the organic fertiliser was calculated by the farm data on pig housing and slurry processing systems. The values calculated by the mass balance method were compared with those from the analysis reports issued by the certified laboratory. The difference did not exceed 20%: 11.2% for N, 13.3% for P, and 18.7% for K. This way, the mass balance method can be effectively used for calculating the characteristics of pig slurry-based organic fertiliser. On the contrary, the data from the current regulatory manure management documents showed the low reliability in the part of the physicochemical properties of fattening pig manure. These documents do not take into account the changes in the fattening pig diets with modern special concentrated feeds, which have a major effect on the manure nutrient content.

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27-35 L. Buskienė and N. Uselis
The influence of nitrogen and potassium fertilizers on the growth and yield of raspberries cv. ‘Polana’
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The influence of nitrogen and potassium fertilizers on the growth and yield of raspberries cv. ‘Polana’

L. Buskienė¹ and N. Uselis²

¹Lithuanian Institute of Horticulture, LT–-54333 Babtai, Kaunas distr., Lithuania; e-mail:institutas@lsdi.lt
²Lithuanian Institute of Horticulture, LT–-54333 Babtai, Kaunas distr., Lithuania; e-mail:n.uselis@lsdi.lt

Abstract:

The experiment was carried out from 1998–2001 at the Lithuanian Institute of Horticulture, according to the scheme: N60 (control); N60K90; N90; N90K130; N120; N120K180; N150;N150K240. The soil was Epicalcari – Endohypogleic cambisol, clay loam, containing 7.2% oforganic matter, 140 mg kg-1 P2O5, 125 mg kg-1 K2O, 11900 mg kg-1 CaO, 3040 mg kg-1 MgO,pHKCl –7.3.Primocane raspberries cv. ‘Polana’ fertilized with the largest amount of nitrogen fertilizers(N150) produced 20% more primocanes in comparison with the control (N60). Potassiumfertilizers increased the diameter of raspberry stems – fertilizing them with N120K180 stemdiameter resulted in an increase of 5.3%, with N90K130 and by 4.2% with N150K240 incomparison with the control.Primocane raspberries cv. ‘Polana’ fertilized with N120K180 gave the highest yieldincrement – 2.5 t ha-1, and, with N60K90 – 2.4 t ha-1 – in comparison with those fertilized onlywith nitrogen fertilizers (N60).When the rate of nitrogen fertilizers was increased from 60 to 90–150 kg ha-1, the nitrogencontent in the soil increased by approximately 25%. When the rate of potassium fertilizers was increased from 90 to 240 kg ha-1, potassium content in the soil increased to 33%. The content of potassium in raspberry cv. ‘Polana’ leaves significantly increased when fertilizing only with the highest rates of potassium fertilizers (N120K180 – N150K240) – by 12.1–19.7% – in comparisonwith control (N60).

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