scholarly journals Changes in enzyme activities as affected by green-manure catch crops and mineral nitrogen fertilization

2014 ◽  
Vol 101 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Anna Piotrowska-Długosz ◽  
Edward Wilczewski
Keyword(s):  
Nitrogen Fertilization ◽  
Enzyme Activities ◽  
Green Manure ◽  
Mineral Nitrogen ◽  
Catch Crops

scholarly journals Plant density and mineral nitrogen fertilization influencing yield, yield components and concentration of oil and protein in soybean grains

Bragantia ◽  
2016 ◽  
Vol 75 (3) ◽  
pp. 362-370 ◽  
Author(s):  
André Sampaio Ferreira ◽  
Alvadi Antonio Balbinot Junior ◽  
Flavia Werner ◽  
Claudemir Zucareli ◽  
Julio Cezar Franchini ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Yield Components ◽  
Plant Density ◽  
Mineral Nitrogen

scholarly journals Uptake of mineral nitrogen from subsoil by winter wheat

2011 ◽  
Vol 52 (No. 8) ◽  
pp. 377-384 ◽  
Author(s):  
J. Haberle ◽  
P. Svoboda ◽  
J. Krejčová
Keyword(s):  
Winter Wheat ◽  
Nitrogen Fertilization ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Mineral Nitrogen ◽  
Clay Loam ◽  
Chernozem Soil ◽  
Mineral N ◽  
Soil Layers ◽  
Fully Depleted

The apparent uptake of mineral nitrogen (N<sub>min</sub>) from top- and subsoil layers during the growth of winter wheat (Triticum aestivum L.) was studied in Prague-Ruzyne on clay loam Chernozem soil in years 1996&ndash;2003. Two (N0,&nbsp;N1) and three treatments, unfertilized (N0), fertilized with 100 kg (N1) and 200 kg (N2) nitrogen per hectare were observed in years 1996&ndash;2000 and 2001&ndash;2003, respectively. The apparent uptake of nitrogen from soil layers was calculated from the changes of N<sub>min</sub> content between sampling terms. Most of available mineral N in the soil down to 90 cm was almost fully depleted between tillering and anthesis in treatment N0. The uptake from subsoil layers was delayed and it continued during the period of grain filling in fertilized treatments. Nitrogen fertilization reduced utilization of N from subsoil. The apparent uptake of N from the zone 50&ndash;120 cm ranged from 21 to 62&nbsp;kg&nbsp;N/ha in&nbsp;N0 and from 15 to 60 kg N/ha in N1 in years 1996&ndash;2000. In years 2001&ndash;2003 the corresponding values (50&ndash;130&nbsp;cm) were 24&ndash;104 kg, 43&ndash;130 kg and 29&ndash;94 kg N/ha in treatments N0, N1 and N2, respectively. The uptake from 120&nbsp;(130)&ndash;150 cm was around zero in a half of experimental years, and it reached at maximum 12 kg/ha in N0 in 1997. There was a strong linear relation between the amount of N<sub>min</sub> in spring and the depletion of nitrogen from the zone 50&ndash;120 (130) cm, R<sup>2 </sup>= 0.94, 0.91 and 0.99 in N0, N1 and N2, respectively.

scholarly journals Distribution of nitrogen in wheat plant in its late growth stages with regard to organic fertilisation and mineral nitrogen rate

2011 ◽  
Vol 51 (No. 12) ◽  
pp. 553-561 ◽  
Author(s):  
B. Čeh-Brežnik ◽  
A. Tajnšek
Keyword(s):  
Green Manure ◽  
Farmyard Manure ◽  
Mineral Nitrogen ◽  
N Recovery ◽  
Growth Stages ◽  
Mineral N ◽  
N Content ◽  
Organic Fertilisation ◽  
N Rates ◽  
The Impact

In Central Slovenia within a long term static experiment IOSDV we investigated the impact of mineral nitrogen (N) fertilisation (0, 65, 130, 195 kg/ha) on the N content and the N amount in winter wheat (larger roots, stems, spikes and leaves) in EC 81/82 and EC 90/91, employing three systems of management: farmyard manure ploughing in before forecrop maize, straw ploughing in and green manure, no organic fertilisation. At EC 81/82 the N content in larger roots was around twice as high as the N content in stems and around twice as low as the N content in spikes and leaves. There was 80% of the whole N amount in plant located in the spikes and leaves (33&ndash;168 kg/ha) in EC 81/82 and 90% in EC 90/91. Calculated N recovery from mineral fertiliser was 68&ndash;87%; it increased with the increasing N rates in the system with farmyard manure ploughing in and in the system with no organic fertilisation, but not in the system with straw ploughing in and green manure. Between EC 81/82 and EC 90/91 wheat gained from 4 to 34 kg N/ha, but there were more important translocations of N inside the plants, which were higher at higher mineral N rates. There was a significant impact of management system on the N uptake at the highest mineral N rate.

scholarly journals AGROECOSYSTEMS TO DECREASE DIFFUSE NITROGEN POLLUTION IN NORTHERN LITHUANIA

2014 ◽  
Vol 22 (3) ◽  
pp. 194-207 ◽  
Author(s):  
Laura Masilionytė ◽  
Stanislava Maikštėnienė ◽  
Aleksandras Velykis ◽  
Antanas Satkus
Keyword(s):  
Winter Wheat ◽  
Environmental Sustainability ◽  
Cropping Systems ◽  
Humus Content ◽  
Nitrogen Concentration ◽  
Cropping System ◽  
Mineral Nitrogen ◽  
Catch Crop ◽  
Catch Crops ◽  
Straw Decomposition

The paper presents the research conducted at the Joniškėlis Experimental Station of the Lithuanian Research Centre for Agriculture and Forestry on a clay loam Gleyic Cambisol during the period of 2006–2010. The research investigated the changes of mineral nitrogen in soil growing catch crops during the winter wheat post-harvest period and incorporating their biomass into the soil for green manure. Green manure implications for environmental sustainability were assessed. The studies were carried out in the soil with a low (1.90–2.00%) and moderate (2.10–2.40%) humus content in organic and sustainable cropping systems. The crop rotation, expanded in time and space, consisted of red clover (Trifolium pretense L.) → winter wheat (Triticum aestivum L.) → field pea (Pisum sativum L.) → spring barley (Hordeum vulgare L.) with undersown red clover. Investigations of mineral nitrogen migration were assessed in the crop rotation sequence: winter wheat + catch crops → field pea. Higher organic matter and nitrogen content in the biomass of catch crops were accumulated when Brassisaceae (white mustard, Sinapis alba L.) was grown in a mixture with buckwheat (Fagopyrum esculentum Moench.) or as a sole crop, compared with oilseed radish (Raphanus sativus var. Oleiferus Metzg.) grown with the long-day legume plants blue lupine (Lupinus angustifolius L.). Mineral nitrogen concentration in soil depended on soil humus status, cropping system and catch crop characteristics. In late autumn there was significantly higher mineral nitrogen concentration in the soil with moderate humus content, compared with soil with low humus content. The lowest mineral nitrogen concentration in late autumn in the 0–40 cm soil layer and lower risk of leaching into deeper layers was measured using organic cropping systems with catch crops. The highest mineral nitrogen concentration was recorded in the sustainable cropping system when mineral nitrogen fertilizer (N30) was applied for winter wheat straw decomposition. In the organic cropping system, the incorporation of catch crop biomass into soil resulted in higher mineral nitrogen reserves in soil in spring than in the sustainable cropping system, (mineral nitrogen fertilizer (N30) applied for straw decomposition in autumn and no catch crop grown). Applying organic cropping systems with catch crops is an efficient tool to promote environmental sustainability.

scholarly journals Repeated use of green-manure catch crops in organic cereal production – grain yields and nitrogen supply

2011 ◽  
Vol 61 (2) ◽  
pp. 164-175 ◽  
Author(s):  
Anne-Kristin Løes ◽  
Trond M. Henriksen ◽  
Ragnar Eltun ◽  
Helge Sjursen
Keyword(s):  
Green Manure ◽  
Nitrogen Supply ◽  
Catch Crops ◽  
Grain Yields ◽  
Cereal Production ◽  
Repeated Use
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