Estimation of the plant-available amounts of N in poultry manure dried with fan separator by15N trace technique Fan separatörle kurutulmuş tavuk gübresinde azotun bitkiye yarayişli miktarinin 15N i̇zleme tekniǧiyle belirlenmesi


Korkmaz A., Kızılkaya R., HORUZ A., Sürücü A.

Turkish Journal of Agriculture and Forestry, vol.24, no.1, pp.63-70, 2000 (Scopus) identifier

Abstract

In this pot experiment, poultry manure dried by Fan separator was applied at different rates N to see the effect of poultry manure on the growth and total N uptake of corn and rice. Contributions of poultry manure to A-values (available N) of soils, %NdfF (N-fertilizer). %NdfPM (poultry manure), nitrogen recovery percent of poultry manure and the quantity of poultry manure equivalent to 1 kg (NH4)2SO4 were determined by 15N trace technique. The results are summarized as follows: 1. Increasing rates N of poultry manure significantly increased the amount of corn straw, rice grain+straw and total N uptake of corn and rice plants. 2. The contribution of poultry manure to A-value (available N) of soils was significant. Increasing rates of poultry manure increased the A-values from 66.19 to 186.70 mg N/kg soil in soil where corn was grown, and from 208.59 to 382.14 mg N/kg soil in soil where rice was grown. 3. Increasing rates N of poultry manure decreased the percentage of nitrogen derived from (NH4)2SO4 labelled with 15N (%NdfF) in total N uptake of corn and rice, whereas the percent nitrogen derived from poultry manure (%NdfPM) increased from 14.24% to 47.87% in corn and from 9.19% to 33.54% in rice. 4. Maximum nitrogen recovery percentage obtained from poultry manure was about 4.61 for corn and 4.13 for rice. 5. It was found that, 1 kg N as (NH4)2SO4 was equivalent to 7.74 kg N as poultry manure in soil where corn was grown, and to 9.65 kg N as poultry manure in soil where rice was grown. Those results show that 1 kg (NH4)2SO4 is equivalent to 50 kg poultry manure dried by Fan separator containing 3.13 % N for corn plant, and to 62 kg poultry manure for rice plant.