Tag Archives: soil fertility

xxx G. Kaci, W. Ouaret and B. Rahmoune
Wheat-Faba bean intercrops improve plant nutrition, yield, and availability of nitrogen (N) and phosphorus (P) in soil
Abstract |
Full text PDF (451 KB)

Wheat-Faba bean intercrops improve plant nutrition, yield, and availability of nitrogen (N) and phosphorus (P) in soil

G. Kaci¹*, W. Ouaret² and B. Rahmoune³

¹M’hamed Bougara University, Faculty of Sciences, Department of agronomy,
DZ35000 Boumerdès, Algeria
²Miami University, Geospatioal Analysis Center, US-OH 45056 Ohio, USA
³High National School of Agronomy, Genetics Ressources and Biotechnology Laboratory, DZ16000 El Harrach, Algeria
*Correspondance: kaci.ghiles@gmail.com

Abstract:

In order to promote agroecological practices, this study compares two cropping systems, i.e., intercropping versus sole cropping of a cereal – durum wheat (Triticum durum Desf. ) and a nitrogen-fixing legume – faba bean (Vicia faba L.) on plant growth, Efficiency in the use of rhizobial symbiosis (EURS), grain yield and phosphorus (P) and nitrogen (N) accumulation in soil and plant. This study conducted during two cropping seasons in a field trial in the region of Tizi Ouzou, Algeria, shows that shoot dry weight (SDW), nitrogen nutrition index (NNI), phosphorus use efficiency (PUE), land use efficiency (LER), and grain yield were significantly higher for intercropped than for the sole cropped wheat. Furthermore, there was a considerable increase in soil P and N content across the two years of intercropping and sole cropping compared to the unseeded weeded fallow. Intercropping, it is claimed, improves wheat N nutrition by increasing the availability of soil-N for wheat. This increase might be due to reduced interspecific competition between legumes and wheat plants than intraspecific competition between wheat plants due to the legume’s ability to compensate by atmospheric nitrogen fixation.

Key words:

, , , ,




444–455 Р. Kopytko, V. Karpenko, R. Yakovenko and I. Mostoviak
Soil fertility and productivity of apple orchard under a long-term use of different fertilizer systems
Abstract |
Full text PDF (419 KB)

Soil fertility and productivity of apple orchard under a long-term use of different fertilizer systems

Р. Kopytko, V. Karpenko*, R. Yakovenko and I. Mostoviak

Uman National University of Horticulture, 1 Instytutska str., UK20305 Uman city, Ukraine *Correspondence: v-biology@mail.ru

Abstract:

An apple should be planted on suitable soils which can be used for growing two or more generations of gardens for decades. This can be reached by creating and supporting an optimum level of mineral nutrients for fruit trees. The aim of this study was to compare the long-term effect of mineral or organic fertilization on apple tree growth and yield and soil fertility. The research has been conducted since 1931, when an apple orchard of Winter-Calville on seedlings was established on dark-grey heavy loam soil of Uman National University of Horticulture. The non-irrigated trees were subjected to the following treatments: 1. Unfertilized (control); 2. Application of cattle manure 40 t ha-1 (organic); 3. N120 P120 K120 (mineral); 4. 20 t ha-1 of humus N60 P60 K60 (organic-mineral). In 1982 the first orchard was removed and 2 year later another one was re-planted on the same soil. The second orchard, that included, beside the same variety also Idared grafted on seedling and on M4, was subjected to the same treatments.
Soil fertility and apple tree productivity increased under the use of organic fertilizer system. Organic-mineral fertilizer system provided almost the same response, while mineral fertilizer system provided the lowest one.
During the study a decreased uptake of nutrients applied with fertilizers was often related to insufficient soil moisture supply. Soluble nitrogen was washed out of root layer into ground water, while phosphorus and potassium were transformed into compounds and forms inaccessible for plant nutrition. Thus it is necessary to apply those rates of fertilizers that are insufficient in the soil to reach the optimal levels of content of corresponding nutrients which should be determined by agrochemical analysis.
It is possible to maintain an optimal fertility of soil in orchards by applying only organic fertilizers. Alkalization of inter-row spacing with regular grass mowing (turf and humus soil management system) provided the same humus content in soil as application of 40 t of humus per ha in a year after the use of fallow system.

Key words:

, , , , ,




517-521 L. Talgre, E. Lauringson, H. Roostalu, A. Astover and A. Makke
Phytomass formation and carbon amount returned to soil depending on green manure crop
Abstract |
Full text PDF (187 KB)

Phytomass formation and carbon amount returned to soil depending on green manure crop

L. Talgre¹, E. Lauringson¹, H. Roostalu², A. Astover² and A. Makke¹

¹ Department of Field Crops and Grasslands, Institute of Agricultural and EnvironmentalSciences, Estonian University of Life Sciences, Tartu, Estonia; e-mail: liina.talgre@emu.ee
² Department of Soil Science and Agrochemistry, Institute of Agricultural and EnvironmentalSciences, Estonian University of Life Sciences, Tartu, Estonia

Abstract:

The trials were carried out during the 2004–2006 growing seasons at the Department of Field Crop and Grassland Husbandry of the Estonian University of Life Sciences. Various green manures and ensuing cereals were studied in respect of phytomass formation and quantity of C returned to soil. The highest amount of organic matter was applied by red clover (8.91 Mg ha–1) and lucerne (8.41 Mg ha–1), and the lowest by unfertilized barley. The total phytomass of pure sowings of barley ranged, depending on the nitrogen fertilizer norm, from 6.55 to 11.54 Mg of dry matter per hectare, of which the grain yield constituted 37.3–43.2%. Sowings of lucerne and red clover added 3.44–3.82 Mg C ha–1 to soil, while sowing of bird’s-foot trefoil supplemented 1.99 Mg C ha–1. Preceding crop determined the phytomass of ensuing crops and the amount of C returned to soil. The amount of C of the oats grown after clover was 5.32 Mg C ha–1, whereas 3.28 Mg C ha–1 was returned to soil. Lucerne pure sowing resulted in 3.17 Mg C ha–1 returned to soil. When oats were preceded by barley (without manure), 2.53 Mg C ha–1 was returned to soil.

Key words:

, , , ,