scholarly journals Use efficiency of nitrogen, phosphorus and potassium by potato cultivars

2018 ◽  
Vol 27 (2) ◽  
pp. 251-261
Author(s):  
Thaísa Fernanda Oliveira ◽  
Talita Gabriela Gentil ◽  
Junia Maria Clemente ◽  
Marcelo Rodrigues dos Reis
Keyword(s):  
Dry Matter ◽  
Potato Cultivars ◽  
Potato Varieties ◽  
Use Efficiency ◽  
Phosphorus And Potassium ◽  
Important Basis ◽  
Nitrogen Phosphorus

Knowledge about nutrients use efficiency in production of tubers in different potato varieties provides important basis to optimize the use of fertilizers in the crop. Thus, this study aimed to determine the productivity and the coefficient of biological utilization (kg of dry matter produced per kg of accumulated nutrient) of nitrogen (N), phosphorus (P) and potassium (K) of thirteen potato cultivars, and compare the extraction and the exportation of N, P and K of Ágata, Asterix and Atlantic cultivars that present low, medium and high content of dry matter, respectively. The treatments consisted of thirteen potato cultivars: Ágata, Atlantic, FL2215, FL2027, FL1867, FL2221, Asterix, BRSIPR Bel, Cupido, Nicolet, Accumulator, Verdi and Taurus. FL2027 cultivar was more productive. The cultivars differs as the coefficient of biological utilization of N, P and K. The Atlantic cultivar extracted and exported more N, P and K than Ágata and Asterix.

Recent advancements of molecular breeding and functional genomics for improving nitrogen-, phosphorus- and potassium-use efficiencies in wheat.

2021 ◽  
pp. 170-196
Author(s):  
T. Maharajan ◽  
G. Victor Roch ◽  
S. Antony Ceasar
Keyword(s):  
Climate Change ◽  
Functional Genomics ◽  
Molecular Breeding ◽  
Nutrient Use Efficiency ◽  
Essential Nutrients ◽  
Impact Of Climate Change ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Abstract This chapter discusses the importance and implications of nitrogen, phosphorus and potassium as essential nutrients and the application of molecular breeding and functional genomics for improving nutrient-use efficiency in wheat are presented. Improvement of nutrient-use efficiency through genetic modification and impact of climate change on nitrogen, phosphorus and potassium management were also discussed.

scholarly journals Comparison of logistic, energy and exploitative parameters of compost and manure application by spreaders

2017 ◽  
Vol 63 (Special Issue) ◽  
pp. S33-S39
Author(s):  
Souček Jiří ◽  
Pražan Radek ◽  
Roy Amitava ◽  
Plíva Petr ◽  
Jelínek Antonín ◽  
...  
Keyword(s):  
Working Conditions ◽  
Dry Matter ◽  
Agricultural Land ◽  
Matter Content ◽  
Organic Fertilizers ◽  
Dry Matter Content ◽  
Volume Weight ◽  
Lower Volume ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

This article deals with comparison of composts and manure use from the viewpoint of handling, transport and application on agricultural land. The published values were established by measurements under working conditions and afterwards converted on the basis of the content of nutrients defined in laboratory. Compost contained a greater share of nitrogen, phosphorus and potassium and had higher dry matter content and lower volume weight. Direct consumed energy expressed by recalculation of the consumed diesel fuel in case of composts moved from 5.12 MJ/kg (potassium) up to 16.19 MJ/kg (phosphorus). In case of manure it was higher and moved from 10.49 MJ/kg (nitrogen) up to 29.79 MJ/kg (phosphorus). The greatest share in energy consumption occupies transport, which was considered uniformly at the distance of 5 km. The study confirmed the feasibility of use of compost in agriculture as a partial substitute of conventional organic fertilizers; for its handling, transport and application the standard mechanization used for manure may be utilized.

N, P and K on organic farms: herbage and cereal production, purchases and sales

1993 ◽  
Vol 120 (3) ◽  
pp. 353-360 ◽  
Author(s):  
S. M. Fowler ◽  
C. A. Watson ◽  
D. Wilman
Keyword(s):  
Dry Matter ◽  
Additional Data ◽  
Cereal Crops ◽  
Organic Farms ◽  
Efficient Conversion ◽  
Cereal Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Clover Content

SUMMARYYields of dry matter, nitrogen, phosphorus and potassium in herbage and cereals from fields representing different stages of the rotation were recorded on two organic farms in 2 years. Amounts of N, P and K purchased and sold were also recorded on these farms.Some additional data was obtained from three other organic farms. Herbage production was very satisfactory, whether fields were grazed or cut. The proportion of clover in sown swards was, in most cases, satisfactory to high, but the clover content was very low in a few fields. The yields of cereals were about equal to or below the average obtained on farms using fertilizer and other agrochemical inputs. Manure was normally applied to the leys, which were the fertility-building part of the rotation, rather than to the cereal crops. Leaching of K from manure heaps was considerable.Purchases of N, P and K (mainly in manure) seemed excessive on one of the farms. On one of the farms studied in less detail, less P and K were purchased than were sold. More attention could be given to the balance between purchases and sales of N, P and K and to the efficient conversion of N into saleable produce.

Nitrogen use efficiency characteristics of commercial potato cultivars

2004 ◽  
Vol 84 (2) ◽  
pp. 589-598 ◽  
Author(s):  
B. J. Zebarth ◽  
G. Tai ◽  
R. Tarn ◽  
H. de Jong ◽  
P. H. Milburn
Keyword(s):  
Nitrogen Use Efficiency ◽  
Dry Matter ◽  
Potato Cultivars ◽  
Utilization Efficiency ◽  
Dry Matter Accumulation ◽  
N Accumulation ◽  
Nitrogen Use ◽  
N Supply ◽  
Commercial Potato ◽  
Use Efficiency

One approach for reducing the contribution of potato (Solanum tuberosum L.) production to nitrate contamination of groundwater is to develop cultivars which utilize N more efficiently. In this study, variation in N use efficiency (NUE; dry matter production per unit crop N supply) characteristics of 20 commercial potato cultivars of North American and European origin were evaluated in 2 yr. Cultivars were grown with or without application of 100 kg N ha-1 as ammonium nitrate banded at planting. The recommended within-row spacing was used for each cultivar and no irrigation was applied. Plant dry matter and N accumulation were determined prior to significant leaf senescence. Crop N supply was estimated as fertilizer N applied plus soil inorganic N measured at planting plus apparent net soil N mineralization. Nitrogen use efficiency decreased curvilinearly with increasing crop N supply. Nitrogen use efficiency was lower for early-maturing cultivars compared to mid-season and late-maturing cultivars. A curvilinear relationship was obtained between plant dry matter accumulation and plant N accumulation using data for all cultivars. Deviations from this relationship were interpreted as variation in N utilization efficiency (NUtE; dry matter accumulation per unit N accumulation). Significant differences in NUtE were measured among cultivars of similar maturity. Nitrogen uptake efficiency (NUpE; plant N content per unit crop N supply) and soil nitrate concentration measured at plant harvest were uniformly low for all cultivars when crop N supply was limited, but varied among cultivars when N was more abundant. This suggests that potato cultivars vary more in terms of N uptake capacity (plant N accumulation in the presence of an abundant N supply) than in terms of NUpE. Key words: Solanum tuberosum, N mineralization, dry matter accumulation, N accumulation, N utilization efficiency

Relationships between production, nutrient accumulation, and chlorophyll synthesis in an Eleocharis quadrangulata population

1971 ◽  
Vol 49 (6) ◽  
pp. 883-888 ◽  
Author(s):  
Claude E. Boyd ◽  
David H. Vickers
Keyword(s):  
Standing Crop ◽  
Dry Matter ◽  
Aquatic Macrophytes ◽  
Chlorophyll Synthesis ◽  
Early Spring ◽  
Chemical Substances ◽  
Net Productivity ◽  
Matter Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Maximum standing crop in an Eleocharis quadrangulata population was estimated at 881 g dry wt./m2. Net daily productivity was highest during May when about 50% of the total standing crop was produced. Net productivity for the entire period of vegetative increase, April 1 to August 4, was 7.0 g/m2 per day. The accumulation of several nutrients, especially nitrogen, phosphorus, and potassium was proportionately more rapid than dry matter production during early spring growth. Net chlorophyll synthesis was also greater during early spring. Patterns of change in dry matter and chemical substances in the E. quadrangulata population were similar to those in populations of other emergent aquatic macrophytes.

scholarly journals Contents of macronutrients and growth of ‘BRS Marataoã’ cowpea fertigated with yellow water and cassava wastewater

2019 ◽  
Vol 14 (3) ◽  
pp. 1 ◽  
Author(s):  
Narcísio Cabral de Araújo ◽  
Vera Lucia Antunes Lima ◽  
Jailton Garcia Ramos ◽  
Elysson Marcks Gonçalves Andrade ◽  
Geovani Soares de Lima ◽  
...  
Keyword(s):  
Human Urine ◽  
Dry Matter ◽  
Mineral Fertilizers ◽  
Fresh Matter ◽  
Number Of Leaves ◽  
Phosphorus And Potassium ◽  
Set Up ◽  
Cassava Wastewater ◽  
Nitrogen Phosphorus ◽  
Reduction Of Costs

Agricultural utilization of yellow waters associated with cassava wastewater is a sustainable technique, since it allows reduction of costs related to acquisition of industrialized fertilizers and minimizes the environmental pollution caused by the inadequate disposal of these effluents. In this context, this study evaluated the macronutrient macronutrient content and growth of cowpea fertigated with yellow water associated with cassava wastewater and NPK as source of nutrients. The experiment was set up in a greenhouse located at Campus I of the Federal University of Campina Grande. The experimental design was completely randomized, composed of five treatments characterized by: fertigation with mineral fertilizers, in the form of NPK; organic fertigation composed of human urine, cassava wastewater, human urine plus cassava wastewater; and organo-mineral fertigation composed of urine, cassava wastewater and mineral phosphorus, with four replicates. At 36 days after sowing, the following parameters were determined: contents of nitrogen, phosphorus, potassium, sulfur and the variables number of leaves, plant height, stem diameter, leaf area, shoot fresh matter and shoot dry matter. The use of yellow waters promotes significant increases for growth and production variables for nitrogen and potassium contents mainly, as well as for growth and production variables. The contents of nitrogen, phosphorus and potassium were higher than the levels considered as adequate for the cowpea crop. The use of human urine and cassava wastewater have potential to meet the needs for the main macronutrients required by cowpea and the irrigation via fertigation with these biofertilizers positively influences the development of cowpea.

Sign in / Sign up

Export Citation Format

Share Document