Effects of Nitrogen Fertilizer on Productivity of Medicinal Pumpkin

Aroiee, Hossein; Omidbaigi, R.

doi:10.17660/actahortic.2004.629.54

Cited by 20 publications

(11 citation statements)

References 9 publications

(12 reference statements)

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“…Results indicated the highest and lowest leaf chlorophyll content were observed at 50 kg N/ha and control plants (at vegetative and flowering stages) but there was no significance between nitrogen levels at the reproductive stage. Similar results have been reported in investigations conducted by Bowen and Frey (2002), Aroiee and Omidbaigi (2004) and Basela et al (2008).…”

Section: Effect Of Nitrogensupporting

confidence: 92%

Effect of plant density and nitrogen fertilizer on growth, yield and fruit quality of sweet pepper (Capsicum annum L.)

Aminifard¹,

Aroiee²,

Ameri³

et al. 2012

Afr. J. Agric. Res.

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The present research was carried out to evaluate response of sweet pepper (Capsicum annum L.) to plant density and nitrogen fertilizer under field conditions. Plant density at four levels (20 × 50 cm, 30 × 50 cm, 20 × 100 cm and 30 × 100 cm) and nitrogen treatments at four levels (0, 50, 100 and 150 kg N/ha) were applied. Plant height, lateral stem number, leaf chlorophyll content, yield, and vitamin C were assessed at immature and mature stages. The results showed that vegetative growth characteristics (plant height, lateral stem number and leaf dry matter) and reproductive factors (fruit volume, fruit weight and plant yield) decreased with increasing plant density, but total yield (kg/ha) increased with increasing plant density. The highest and lowest total yields were obtained by plant density 20×50 cm and 30×100 cm respectively. Nitrogen fertilizer was significantly affected on plant height, lateral stem number and leaf chlorophyll content. It was observed that fertilization with 50 kg N/ha resulted to the highest fruit volume and plant yield. There were significant differences between fruit volume and fruit weight by interaction between plant density and nitrogen treatments.

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Section: Effect Of Nitrogensupporting

confidence: 92%

Effect of plant density and nitrogen fertilizer on growth, yield and fruit quality of sweet pepper (Capsicum annum L.)

Aminifard¹,

Aroiee²,

Ameri³

et al. 2012

Afr. J. Agric. Res.

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“…The higher N content in nitrogen fertilized plants could be connected with the positive effect of nitrogen in some important physiological processes (Chaturved, 2005). Table ( These results are in conformity with Aroiee and Omidbaigi (2004) on pumpkin, Goreta et al (2005) on watermelon, Olaniyi and Akanbi (2007) on pumpkin and Herdari and Mohammad (2012) on bitter melon who reported that mineral elements contents in the shoots and fruits increased as application of nitrogen increased.…”

Section: -Plant Mineral Elements Contentsupporting

confidence: 82%

Plant Growth, Fruit Yield and Mineral Content of Bottle Gourd (Lagenaria siceraria M) as Affected by Plant Density and Nitrogen Fertilizer

El-Seifi

Hassan

Elwan

et al. 2015

HJSC

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This experiment was carried out during two successive summer seasons of 2012 and 2013 on bottle gourd landrace El-Arishy (Lagenaria siceraria M) at the Experimental Research Farm of the Faculty of Agriculture, Suez Canal University, Ismailia, Egypt to study the effect of plant density and nitrogen fertilizer on plant growth, yield and its components as well as mineral content. The obtained results showed that the low plant population (1750 plant per fad.) gave the highest shoot fresh weight, shoot dry weight, average fruit weight, average fruit length and nitrogen content in shoots and fruits. However, the significant highest fruit yield and fruit number per faddan were associated with the high plant population (3500 plant per faddan). All previous mentioned parameters in addition to shoot and fruit phosphorus contents significantly improved by application of high nitrogen rate (20g/plant). Shoot and fruit potassium and phosphorus contents were not affected significantly by plant spacing. Fruit potassium content did not affect significantly by nitrogen fertilizer. All the above mentioned parameters were significantly higher with the interaction between low plant population (1750 plant per fad.) was combined with high nitrogen rate (20g/plant), except fruit yield (ton/fad.) and fruit number which increased by the combination of high plant population with high nitrogen rate. Potassium content did not affect by the interaction between plant spacing and nitrogen fertilizer.

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“…The N resource is a major constituent of several of the most important substances in plants, and application of N fertilizer would increase leaf chlorophyll. 28 The P resource is involved in many metabolic processes essential for normal growth, such as photosynthesis, which exerts influence on the stability of the chlorophyll molecule. Vafaie et al 29 indicated that Mg also affected the leaf chlorophyll content of safflower because Mg resource is a component of chlorophyll and the activating agent of enzyme production.…”

Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

Influence of Soil and Irrigation Water pH on the Availability of Phosphorus in Struvite Derived from Urine through a Greenhouse Pot Experiment

Liu

Tao²,

Wen

et al. 2016

J. Agric. Food Chem.

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One greenhouse pot experiment was used to investigate the availability of phosphorus in struvite derived from urine affected by soil pH (cinnamon soil, pH 7.3; paddy soil, pH 5.3) and irrigation water (pH 6.0 and 7.5) with bird rapeseed (Brassica campestris L.). The biomass of applied struvite in paddy soil was significantly greater than that of applied calcium superphosphate. However, statistically significant differences were not observed in cinnamon soil. Soil-applied struvite had a higher Olsen P compared to soil-applied calcium superphosphate irrespective of soil type. The biomass of applied struvite and irrigation with pH 6.0 water was greater compared to that with irrigation with pH 7.3 water irrespective of soil type, accompanied with significantly higher leaf chlorophyll concentration. Therefore, struvite has the potential to be an effective P fertilizer, and acidic irrigation water has greater influence on the availability of phosphorus in struvite than does acidic soil. KEYWORDS: struvite, phosphorus, plant availability, soil, irrigation water ■ INTRODUCTIONPhosphorus (P), as an indispensable resource, is an essential nutrient for crop growth. The depletion timeline of P rock reserves ranges from 30 to 300 years.1 Although this estimation provides substantial uncertainty and more accurate data are lacking, there is no doubt regarding the irreversible depletion of high-concentration rock P reserves and the decline of the quality of the reserves (such as % P and presence of impurities) over time, 1 resulting in higher economic and energy cost for P exploitation. If P can be recovered in an economical way, it can re-enter the agricultural supply chain, displacing the consumption of traditional P fertilizer. It helps to create an ecofriendly environment by reducing the need for P rock 2 and to alleviate the P load emissions to water bodies. Human urine accounts for approximately 50% of the total P load in municipal wastewater, with <1% of the total wastewater volume.3 Direct application of urine in agriculture is feasible in practice. 4 However, huge quantities of separated urine are often difficult to transport and to store due to its unpleasant odor. Furthermore, health risk due to micropollutants and nitrogen (N) loss due to ammonia volatilization will be unavoidable during the application of urine to soil. Therefore, P recovery from urine in the form of struvite crystals will be a promising option with easy transportation, hygiene safety, and less nutrient loss.Struvite crystal is formed with an equal molar concentrations of magnesium (Mg), ammonium, and phosphate combined with six water molecules (MgNH 4 PO 4 ·6H 2 O), which contains 5.7% N, 12.6% P, and 9.9% Mg by weight. The solubility of struvite is highly dependent on pH, 5 and it is sparingly soluble in neutral and alkaline solutions, but readily soluble in acid solution. The P in the urine is mainly present as inorganic phosphate, and struvite obtained from urine has the advantages of higher P 2 O 5 content (28.9%) compared to common ...

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Effects of Nitrogen Fertilizer on Productivity of Medicinal Pumpkin

Cited by 20 publications

References 9 publications

Effect of plant density and nitrogen fertilizer on growth, yield and fruit quality of sweet pepper (Capsicum annum L.)

Effect of plant density and nitrogen fertilizer on growth, yield and fruit quality of sweet pepper (Capsicum annum L.)

Plant Growth, Fruit Yield and Mineral Content of Bottle Gourd (Lagenaria siceraria M) as Affected by Plant Density and Nitrogen Fertilizer

Influence of Soil and Irrigation Water pH on the Availability of Phosphorus in Struvite Derived from Urine through a Greenhouse Pot Experiment

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