scholarly journals Effects of NAA and nitrogen fertilizer on NPK uptake and nitrogen use efficiency of BARI gom-25 (Triticum aestivum L.)

2020 ◽  
Vol 49 (3) ◽  
pp. 643-651
Author(s):  
AMM Golam Adam ◽  
Nargis Jahan ◽  
Parveen Rashid
Keyword(s):  
Grain Filling ◽  
N Fertilizer ◽  
Flowering Stage ◽  
Sowing Time ◽  
Nitrogen Use ◽  
Seed Soaking ◽  
Npk Uptake ◽  
Total Plant ◽  
Use Efficiency ◽  
Grain Filling Stage

Effects of NAA (both as seed soaking and foliar spray) in combination with nitrogen fertilizer (0, 25, 50, 75 and 100% of recommended dose) on NPK uptake and nitrogen use efficiency (NUE) of BARI Gom-25 at flowering, grain filling, harvest and two sowing time (November 15 and 22) were evaluated. At flowering stage, significantly higher NPK uptake by shoot and root was obtained from seed soaking in 10 ppm NAA in combination with 75% N fertilizer (SOF3) in both the sowing time with a few exceptions. But at grain filling stage, significantly higher NPK uptake by both shoot and root and N uptake by root was recorded from seed soaking in 10 ppm NAA in combination with 100% N fertilizer (SOF4) followed by SOF3 treatment. In comparison to full dose of N fertilizer, significantly higher NPK uptake by shoot, root and grain was also recorded from SOF3 treatment in most of the cases. Findings indicated that NAA treatment at varying N-level had better stimulation on N and P uptake when sown on November 15 than November 22. However, the trend was reverse in case of K uptake. The NUE was significantly influenced by NAA at various N-levels. At flowering stage, significantly higher NUE of shoot and total plant was obtained from SOF3 treatment in both sowing times. Whereas at grain filling stage, the same response was recorded from seed soaking in 10 ppm NAA in combination with 25% N fertilizer (SOF1). Foliar application of 20 ppm NAA in combination with 25% N fertilizer (SSF1) also resulted significantly higher NUE of root at both flowering and grain filling and those of shoot, grain and total plant with a few exceptions at harvest.

scholarly journals Effects of NAA and different nitrogen levels on nutrient uptake by BARI Gom-26 (Triticum aestivum L.)

2016 ◽  
Vol 42 (1) ◽  
pp. 69-76
Author(s):  
Saiful Islam ◽  
Nargis Jahan
Keyword(s):  
Grain Filling ◽  
N Fertilizer ◽  
Flowering Stage ◽  
K Uptake ◽  
N Content ◽  
Nitrogen Levels ◽  
Filling Stage ◽  
P Content ◽  
Npk Uptake ◽  
Grain Filling Stage

An experiment was conducted to evaluate the effects of NAA (0, 25, 50 ppm) at varying nitrogen levels (0, 50, 75, 100 % of the recommended dose) on nitrogen (N), phosphorus (P) and potassium (K) uptake by shoot and root and percentage of total NPK uptake by BARI Gom-26 at flowering and grain filling stage. Application of NAA at varying nitrogen levels had significant effect on P and K uptake by shoot and root at both stages, whereas, the N content of shoot at flowering stage and of root at the grain filling stage were non-significant.At both the stages, K content of root increased following all the treatments. At flowering and grain filling stage, P content of root and shoot increased and decreased due to different treatments. The maximum percentage of total NPK uptake was recorded from K followed by N and P respectively at both stages. In majority cases there was a decreasing trend in percentage uptake of N and P at grain filling stage compared with flowering stagewhereas, the trend was almost reverse in case of K. The N content of grain increased following all the treatments, the maximum being due to 25 ppm NAA in combination with 75 % N-fertilizer. Only decrease in P content of grain was recorded when 25 ppm NAA without any N-fertilizer was applied. In case of K content, 50 ppm NAA without any N-fertilizer resulted the only decrease. The highest nitrogen use efficiency (NUE) by total plant was also recorded from 50 ppm NAA in combination with 50 % N-fertilizer at flowering stage, whereas, from 25 ppm NAA in combination with 75 % N-fertilizer at grain filling stage.J. Asiat. Soc. Bangladesh, Sci. 42(1): 69-76, June 2016

scholarly journals Effect of sowing time and nitrogen fertilizer rates on growth, seed yield and nitrogen use efficiency of quinoa (Chenopodium quinoa Willd) in Ahvaz, Iran

2020 ◽  
Vol 21 (4) ◽  
pp. 354-367
Author(s):  
Srorlmolook Saeidi ◽  
Seyed Ataollah Siadat ◽  
Ali Moshatati ◽  
محمدرضا Moradi-Telavat ◽  
Niazali Sepahvand ◽  
...  
Keyword(s):  
Seed Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Chenopodium Quinoa ◽  
Sowing Time ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Fertilizer Rates

scholarly journals Nitrogen Uptake and Use Efficiency in Sweet Basil Production under Low Tunnels

HortScience ◽  
2020 ◽  
Vol 55 (4) ◽  
pp. 429-435 ◽  
Author(s):  
Tej P. Acharya ◽  
Mark S. Reiter ◽  
Greg Welbaum ◽  
Ramón A. Arancibia
Keyword(s):  
Open Field ◽  
N Uptake ◽  
Dry Weight ◽  
N Fertilizer ◽  
Plant N Uptake ◽  
Available N ◽  
Sweet Basil ◽  
Total Plant ◽  
Use Efficiency ◽  
Low Tunnels

Low tunnels (LTs) enhance vegetative growth and production in comparison with open field, but it is not known whether nitrogen (N) requirements and use efficiency increase or decrease for optimal crop performance. Therefore, the purpose of this study was to determine differences in N requirement, uptake, and use efficiency in basil grown under LTs compared with open field. The experimental design each year was a split plot with four replications. The main effect (plots) was N fertilizer application rate (0, 37, 74, 111, 148, and 185 kg·ha−1) and the secondary effect (subplots) was production system (LTs covered with spun-bonded rowcover vs. open field). Plant height and stem diameter were greater under LT than open field; however, they were unaffected by N fertilizer rate. Total fresh and dry weight increased with LT by 61% and 58% and by 50% and 48% in 2017 and 2018, respectively. Optimum N rates for fresh weight (98% of peak yield) were 124 and 104 kg·ha−1 N under LT and open field, respectively. Leaf N concentration decreased under LT, but total plant N uptake increased because of increased dry weight. Without fertilization, soil available N use efficiency (SNUE) for dry weight increased by 45% and 66% in 2017 and 2018, respectively. Mixed results were obtained for N fertilizer use efficiency (NFUE) in response to N rate. In conclusion, LT increased summer production of sweet basil, total plant N uptake, and SNUE.

scholarly journals Effect of Nitrogen Nutritional Statuses and Waterlogging Conditions on Growth Parameters, Nitrogen Use Efficiency and Chlorophyll Fluorescence in Tamarillo Seedlings

2016 ◽  
Vol 44 (2) ◽  
pp. 375-381 ◽  
Author(s):  
Hermann RESTREPO-DIAZ ◽  
Jorge BETANCOURT-OSORIO ◽  
Diego SANCHEZ-CANRO
Keyword(s):  
Nitrogen Use Efficiency ◽  
Growth Parameters ◽  
Dry Weight ◽  
Shoot Length ◽  
Dry Matter Partitioning ◽  
Nitrogen Use ◽  
Horticultural Crops ◽  
Leaf Chlorophyll ◽  
Total Plant ◽  
Use Efficiency

Climate change has altered rainfall patterns causing waterlogging periods that often negatively affect the performance of horticultural crops in the Andean region in Colombia. An experiment was carried out under greenhouse conditions using three-month-old tamarillo (Solanum betaceum Cav.) seedlings, which were grown under two levels of nitrogen (N) (10 and 150 mg N∙L H2O). At 28 days after transplanting (DAT), waterlogging treatments were established when well-nourished plants (150 mg N L-1 H2O) significantly showed a higher shoot length than poor-nourished plants (10 mg N L-1 H2O) (~20 cm vs. ~10 cm, respectively). Three different periods of waterlogging were performed between 35 and 37, 51 and 55, and 64 and 70 DAT by covering the holes in the plastic pots to ensure a constant water depth. Results showed that well-nourished plants without waterlogging treatments through the experiment’s stress showed a greater shoot length (30 cm), total plant dry weight (7.95 g), Fv/Fm ratio (0.62) and leaf chlorophyll content (37.51 SPAD units) than poor-nourished plants without stress condition (15 cm, 5.57 g, 0.5 and 12.69 SPAD units, respectively) at the end of the experiment. Overall, waterlogging reduced leaf area and nitrogen use efficiency (about 75% and 50%, respectively) in both N levels. However, periods of waterlogging enhanced dry matter partitioning to stems (around 30-35%) in both N levels. This study showed that tamarillo plants are susceptible to landscaping situations where periods of waterlogging can be expected regardless of their N nutritional status.

Influence of tillage systems and nitrogen management on grain yield, grain protein and nitrogen-use efficiency in UK spring wheat

2016 ◽  
Vol 154 (8) ◽  
pp. 1437-1452 ◽  
Author(s):  
K. RIAL-LOVERA ◽  
W. P. DAVIES ◽  
N. D. CANNON ◽  
J. S. CONWAY
Keyword(s):  
Soil Moisture ◽  
Grain Yield ◽  
Spring Wheat ◽  
Wheat Yield ◽  
N Fertilization ◽  
N Fertilizer ◽  
Grain Protein ◽  
Tillage Systems ◽  
Nitrogen Use ◽  
Use Efficiency

SUMMARYEffects of soil tillage systems and nitrogen (N) fertilizer management on spring wheat yield components, grain yield and N-use efficiency (NUE) were evaluated in contrasting weather of 2013 and 2014 on a clay soil at the Royal Agricultural University's Harnhill Manor Farm, Cirencester, UK. Three tillage systems – conventional plough tillage (CT), high intensity non-inversion tillage (HINiT) and low intensity non-inversion tillage (LINiT) for seedbed preparation – were compared at four rates of N fertilizer (0, 70, 140 and 210 kg N/ha). Responses to the effects of the management practices were strongly influenced by weather conditions and varied across seasons. Grain yields were similar between LINiT and CT in 2013, while CT produced higher yields in 2014. Nitrogen fertilization effects also varied across the years with no significant effects observed on grain yield in 2013, while in 2014 applications up to 140 kg N/ha increased yield. Grain protein ranged from 10·1 to 14·5% and increased with N rate in both years. Nitrogen-use efficiency ranged from 12·6 to 49·1 kg grain per kg N fertilizer and decreased as N fertilization rate increased in both years. There was no tillage effect on NUE in 2013, while in 2014 NUE under CT was similar to LINiT and higher than HINiT. The effect of tillage and N fertilization on soil moisture and soil mineral N (SMN) fluctuated across years. In 2013, LINiT showed significantly higher soil moisture than CT, while soil moisture did not differ between tillage systems in 2014. Conventional tillage had significantly higher SMN at harvest time in 2014, while no significant differences on SMN were observed between tillage systems in 2013. These results indicate that LINiT can be used to produce similar spring wheat yield to CT on this particular soil type, if a dry cropping season is expected. Crop response to N fertilization is limited when soil residual N is higher, while in conditions of lower residual SMN, a higher N supply is needed to increase yield and improve grain protein content.

scholarly journals Changes In Biochemical Components Of Rice Following Naa Application

2014 ◽  
Vol 40 (2) ◽  
pp. 173-178
Author(s):  
Nargis Jahan ◽  
AMM Golam Adam
Keyword(s):  
Chlorophyll A ◽  
Energy Content ◽  
Oryza Sativa L ◽  
Foliar Spray ◽  
Grain Filling ◽  
Naphthalene Acetic Acid ◽  
Flowering Stage ◽  
Filling Stage ◽  
Biochemical Components ◽  
Grain Filling Stage

An investigation on the effect of Naphthalene acetic acid (NAA) on the changes of biochemical components of two varieties of rice (Oryza sativa L.), BRR1 dhan 29 and BRRI dhan 50 was carried out. Two concentrations of NAA, 100 and 200 ppm were used as foliar spray. In BRRI dhan 29, significant increases in chlorophyll a and chlorophyll b contents of leaf were observed due to both the treatments at the flowering stage, whereas, carotenoids at the grain filling stage only. But in BRRI dhan 50, the total leaf pigments decreased at the flowering and grain filling stage, but was significant in case of chlorophyll a at the flowering stage. Significant increases in protein content of leaf were recorded at the tillering and flowering stage of BRRI dhan 29 following 100 ppm NAA treatment. In BRRI dhan 50, the only significant increase was recorded at grain filling stage due to 200 ppm NAA treatment. In both the varieties carbohydrates, protein, fat, and energy content of grain increased due to both the treatments and the maximum increase in all the cases was recorded due to 100 ppm NAA treatment. Ash and moisture content of grain reduced following both the treatments in both the varieties, the maximum reduction was due to 100 ppm NAA treatment Asiat. Soc. Bangladesh, Sci. 40(2): 173-178, December 2014

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