nitrogen – INNSPUB edublog

March 18, 2017

The sustainable aquaculture in morocco by optimization of the energy of the feed of rainbow trout – IJAAR

Aba Mustapha, Belghyti Driss, Benabid Mohammed, Maychal aziz

Biology and Health Laboratory, Environmental and Parasitology Team/UFR Doctoral, Sciences Faculty, Ibn Tofail University, Kenitra, Morocco

National Center of Hydrobiology and Pisciculture (NCHP) Azrou, Morocco

Domaines agricoles. Truites de l’Atlas Azrou. Morocco

Key words: Feed efficiency, Energy, Nitrogen, Phosphorus, Rainbow trout, Sustainable aquaculture.

Abstract

This research is an update in fish nutrition research in Morocco, and provides insight on the progression and evolution of this field in order to meet the needs of the aquaculture with the purpose to achieve a balance in fish nutrition and aquaculture sustainability. Continue reading The sustainable aquaculture in morocco by optimization of the energy of the feed of rainbow trout – IJAAR

March 15, 2017March 15, 2017

Effect of nitrogen rates and weed interferenceon yield and yield components of corn (Zea mays L.) – IJAAR

Safar Nasrollahzadeh, AysanHajebrahimi, JalilShafagh-Kolvanagh, Sajjad Shaker Kouhi

Department of Plant Ecophysiology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

Key words: Corn, nitrogen, weed interference, yieldcomponents.

Abstract

Time of weed control and fertilizer application usually decide the profitability of crop production. The effects of nitrogen and weed interference duration on yield and yield components of corn was studied in the Research Station of University of Tabriz, Iran, in 2009. The experiments were carried out as split-plot, based on randomized complete block design with three replications. Continue reading Effect of nitrogen rates and weed interferenceon yield and yield components of corn (Zea mays L.) – IJAAR

March 1, 2016

Effect of application of Nitrogen and Potassium fertilizers on some vegetative and reproductive traits in Roselle (Hibiscus sabdariffa)

Shiva Ghasemi, Khadijeh Abbaszadeh, Mostafa Ghasemi, Morteza Salari, Fatemeh Zarei

Department of Horticulture, Hormozgan University, Bandar Abbas, Iran

Key words: Roselle, Nitrogen, Potassium, Vegetative, Reproductive.

Abstract

A pot experiment was carried out to examine the effect of application of nitrogen and potassium fertilizers on some vegetative and reproductive traits in Roselle (Hibiscus sabdariffa). Treatments were included control with no fertilizer (T1); 70 mg N per kg soil (T2); 50 mg K2O per kg soil (T3); and combination of T2 and T3 (T4) that applied on 30 day old seedlings. In the end of experiment (30 days after flowering), the parameters stem height, stem diameter, number of leaves and flowers, flower diameter, calyx length, number of shoots, fresh and dry weight of organs and vitamin C were evaluated. The results showed that were significant differences in some parameters among applied treatments. Treatments 3 and 4 showed no significant differences in studied parameters. Application of nitrogen fertilizer decreased the levels of vitamin C while potassium fertilizer and integrated use of N and K increased the levels of vitamin C. The traits stem height, stem diameter, number of leaves, number of flowers, number of shoots, biomass of leaves and flowers were not significantly affected by fertilizer treatments. The highest flower diameter (2.63 cm), calyx length (2.91 cm) and flower dry weight (10.56 g), were obtained at treatment of 50 mg K2O kg-1 soil. The results showed that the treatments K alone and combination of N with K were more efficient than either N or no fertilizer in improving traits of Roselle.

Source:

* Pdf: http://www.innspub.net/wp-content/uploads/2015/08/IJAAR-V7No2-p75-79.pdf

February 14, 2016

Effect of crop establishment/irrigation techniques and nitrogen levels on growth, yield, nutrient uptake and quality of hybrid maize (Zea mays L.)

P.K. Singh, Sachin Kumar, Arvind Kumar, Raj Kumar

Department of Agronomy, R.K. (P.G.) College, Shamli, C.C.S.U., Meerut, U.P247776, India

Key words: Growth, nitrogen, planting/irrigation, quality, maize.

Abstract

A field experiment was conducted during 2010 and 2011, under three replications. One row in Furrow Irrigated Raised Bed/ every furrow irrigation increased plant height by 7.94 %, stem girth by 46.47 per cent, and dry matter at maturity by 23.69 % over conventional sowing/ conventional irrigation. Similarly, number of leaves increased by 19.26 and 24.65 % leaf area by 25.83 and 26.65 %, over conventional practice at 60 and 90 days after sowing, respectively. Besides, it resulted 1.91 and 1.82 % higher total chlorophyll over conventional practice at 30 and 60 days after sowing, respectively and increased grain by 60.72 %, biological 42.44 % and stover yield by 30.2 % over conventional practice and also resulted 3.43 higher starch and 12.05 % protein content over conventional practice. One row in FIRB/ every furrow irrigation, had 62.1, 51.5 and 42.9 % higher uptake for nitrogen, phosphorus and potassium over conventional practice of crop establishment, respectively. Though, growth, yield attributes and yields were recorded highest with 200 kg N level, but the differences remained non significant with 150 Kg N. Application of 150 kg N/ha out yielded 10.78, 21.71 and 2.58 % higher biological, grain and stover yield over 100 kg N/ha. To harness existing agri-resources and attaining higher quality and quantity of maize production, the crop should be raised on FIRB and irrigated in each furrow and should be fertilized with 150 kg N/ha.

Source:

* Pdf: http://www.innspub.net/wp-content/uploads/2015/06/IJAAR-V6No6-p82-90.pdf

February 6, 2016

The effect of seed priming with salicylic acid on growth and grain yield of pinto bean under nitrogen levels

Amir Heidari, Farid Shekari, Jalal Saba, Gholamreza Shahidi

Department of Agronomy and Plant Breeding, Faculty of Agriculture, Zanjan University, Zanjan, Iran

Department of Agronomy and Plant Breeding, Ardabil Branch, Islamic Azad University, Ardabil, Iran

Key words: Salicylic acid, seed priming, chlorophyll, nitrogen, grain yield.

Abstract

A field experiment was carried out to study the effects of seed priming by salicylic acid on growth and grain yield of pinto bean (Phaseolus vulgaris L. cv. Khomain) were investigated under different nitrogen application conditions. This experiment was carried out in factorial experiment in completely randomized block design with three replications in 2013 growing season at research station of Zanjan city (university of Zanjan) and Khoramdareh city of Iran. The experimental treatments included nitrogen fertilizer with four levels (included 0, 20, 40 and 80 kg ha-1) and seed priming with salicylic acid with five levels (included 0 (control), 750, 1500 and 2250 μM and also hydro-priming). The result showed that nitrogen (N) and salicylic acid (SA) had significant effects on morphology traits and grain yield. Mean comparison showed that chlorophyll index, dry weight of stem and leaves, stem length, leaves area and grain yield increased in SA compared to control treatment. Means comparison showed that the treatment of 2250 μM SA had the highest morphology traits and yield which was higher than that other treatments. As well as morphology characteristics such as dry weight of leaves were significantly increased with the increasing nitrogen levels and also improvement on grain yield. Furthermore, application of 20, 40 and 80 kg ha-1 N increased grain yield by 10%, 3.5% and 5.4% respectively, compared to the control plants. However, hydro priming could not affect this grain yield and not signification by control.

Sources:

*Pdf: http://www.innspub.net/wp-content/uploads/2015/01/IJB-V6No1-p298-307.pdf