Effects of N fertilizer rate, soil water tension and soil texture on growth and N uptake by maize (Zea mays L.)

1987 ◽  
Vol 13 (3) ◽  
pp. 241-254 ◽  
Author(s):  
O. I. Nnoham ◽  
S. O. Odurukwe
Keyword(s):  
Zea Mays ◽  
Soil Water ◽  
Soil Texture ◽  
Zea Mays L ◽  
N Uptake ◽  
N Fertilizer ◽  
Fertilizer Rate ◽  
Soil Water Tension ◽  
Water Tension ◽  
N Fertilizer Rate

scholarly journals Variety and N-Fertilizer Rate Influence the Growth, Yield and Yield Parameters of Baby Corn (Zea mays L.)

2014 ◽  
Vol 6 (3) ◽  
Author(s):  
Md. Asaduzzaman ◽  
Mrityunjoy Biswas ◽  
Md. Nazrul Islam ◽  
Mohammad Mokhlesur Rahman ◽  
Rafeza Begum ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Growth Yield ◽  
N Fertilizer ◽  
Fertilizer Rate ◽  
Yield Parameters ◽  
N Fertilizer Rate

scholarly journals TENSÃO DE ÁGUA NO SOLO PARA O REINÍCIO DA IRRIGAÇÃO DE MILHO VERDE NO SEMIÁRIDO

2018 ◽  
Vol 17 (2) ◽  
pp. 190
Author(s):  
IGNACIO ASPIAZÚ ◽  
FERNANDO GOMES DA SILVA ◽  
RENATO MENDES OLIVEIRA ◽  
KAREN MARCELLE DE JESUS SILVA ◽  
SILVÂNIO RODRIGUES DOS SANTOS ◽  
...  
Keyword(s):  
Zea Mays ◽  
Soil Water ◽  
Zea Mays L ◽  
Irrigation Management ◽  
Winter Season ◽  
Dry Mass ◽  
Area Index ◽  
Soil Water Tension ◽  
Yield Parameters ◽  
Water Tension

  RESUMO O objetivo deste trabalho foi determinar em campo a tensão de água do solo adequada para o reinício da irrigação do milho verde no semiárido. O experimento constou de seis valores de tensão matricial da água do solo (20 kPa, 40 kPa, 60 kPa, 80 kPa, 100 kPa e 120 kPa) testadas em uma cultivar de milho, o hibrido duplo AG 1051. O experimento foi instalado no período de inverno de 2013, nos meses de agosto a novembro, num delineamento experimental de blocos casualizados (DBC), com quatro repetições, conduzidos na fazenda experimental da Embrapa Milho e Sorgo em Nova Porteirinha, MG. Foram avaliadas as variáveis: produtividade de espigas sem palha (t ha-1), número de espigas totais e comerciais por hectare, comprimento de espigas com palha e sem palha e diâmetro de espigas comerciais. Dentre os resultados pode-se constatar que os maiores valores para as variáveis de morfologia e de produtividade foram obtidos quando a irrigação foi efetuada com tensão próxima de 50 kPa, tornando-a a tensão mais adequada para o uso racional da água no manejo da irrigação do milho verde.Palavras-chave: Zea mays L., déficit hídrico, manejo da irrigação, resistência elétrica. SOIL WATER TENSION FOR REWATERING GREEN CORN IN THE SEMIARID  ABSTRACT _ The objective of this work was to determine the adequate water tension for rewatering green corn at field conditions in the semiarid. The experiment consisted of six values of matric soil water tension (20 kPa, 40 kPa, 60 kPa, 80 kPa, 100 kPa and 120 kPa) and one maize cultivar, the double hybrid AG1051. The experiment was installed in the 2013 winter season, from August to November, in a randomized blocks design (DBC), with four replicates, and conducted at the experimental farm belonging to Embrapa Maize and Sorghum in Nova Porteirinha, MG. Morphological parameters were evaluated such as plant height, leaf area index and dry mass, and also the yield parameters such as weight of spikes with straw and without straw (t ha-1), number of total and commercial spikes per hectare, diameter of commercial spikes and length of commercial spikes with and without straw. The highest values for the morphology and productivity variables were obtained when irrigation was carried out with a tension close to 50 kPa, which proved to be the most suitable tension for the rational use of water in the irrigation management of green corn.Keywords: Zea mays L., water deficit, irrigation management, electrical resistance.

No-tillage culture and nitrogen fertilizer management for burley tobacco production

2016 ◽  
Vol 155 (4) ◽  
pp. 599-612 ◽  
Author(s):  
C. ZOU ◽  
R. C. PEARCE ◽  
J. H. GROVE ◽  
M. S. COYNE
Keyword(s):  
N Uptake ◽  
N Fertilization ◽  
N Fertilizer ◽  
No Tillage ◽  
Fertilizer Management ◽  
Fertilizer Rate ◽  
Burley Tobacco ◽  
Tobacco Production ◽  
N Fertilizer Rate

SUMMARYFew studies have investigated nitrogen (N) fertilizer management in no-tillage (NT) tobacco (Nicotiana tobacumL.) production systems, even though N fertilization is known to influence tobacco cured leaf yield and quality. The present study evaluated how tillage practice and N fertilizer rate affected burley tobacco agronomic performance, plant available nitrogen (PAN) supply, and leaf chemical constituents. In 2012 and 2013, three N fertilizer rates (0, 140 and 280 kg N/ha) were introduced as split-plots within a long-term NT and conventional tillage (CT) (mouldboard plough) comparison study. Results (2007–2013) showed that the effect of tillage on tobacco yield depended on seasonal weather; NT tobacco appeared to have lower yield than CT tobacco in seasons with <450 mm growing season rainfall, but similar yields when rainfall was >500 mm. In 2012 (432 mm rainfall; 84% of the long-term seasonal mean), leaf SPAD reading, leaf nitrate concentration, total nitrogen concentration at the topping day (i.e. removal of flowers/buds at the tops of the plants) and cured leaf nicotine and alkaloid content suggested that N deficiency was more pronounced in NT than CT at the lowest N fertilizer rate. The PAN supply, as measured by a modifiedin situresin core method, was similar in 2012 between NT and CT, suggesting that plant factors may have had a role in N uptake efficiency. This scenario did not repeat in 2013 (706 mm rainfall; 137% of the long-term seasonal mean). Even though N fertilization rates were identical for both tillage practices in 2012 and 2013, PAN was lower, on average, in 2012. Because N uptake is largely the result of mass flow, the impact of reduced root density in NT tobacco would be expected to be more pronounced in a season such as 2012, when water was limited. Banding N close to the tobacco root system and/or side-dressing some portion of N may be recommended strategies to improve N use efficiency in NT burley tobacco production.

Nitrogen management of fallow crops in Canadian prairie soils

2012 ◽  
Vol 92 (7) ◽  
pp. 1389-1401
Author(s):  
R. E. Karamanos ◽  
F. Selles ◽  
D. C. James ◽  
F. C. Stevenson
Keyword(s):  
Water Use ◽  
N Uptake ◽  
Maximum Yield ◽  
Nitrogen Management ◽  
N Fertilizer ◽  
Fertilizer Rate ◽  
Canadian Prairie ◽  
Prairie Soils ◽  
Fertilizer Rates ◽  
N Fertilizer Rate

Karamanos, R. E., Selles, F., James, D. C. and Stevenson, F. C. 2012. Nitrogen management of fallow crops in Canadian prairie soils. Can. J. Plant Sci. 92: 1389–1401. The ability of fallow to supply nitrogen (N) to crops has been questioned, particularly for crops with greater N requirements. A study was conducted to determine canola (Brassica napus L.) and wheat (Triticum aestivum L.) responses to a range of N fertilizer rates (0–75 kg N ha−1 for canola and 0–50 kg N ha−1 for wheat) at 17 fallow sites across Saskatchewan and Alberta, Canada, from 2003 to 2005. Yield and N uptake responses to progressively greater N fertilizer rates were curvilinear for both crops. Maximum yield occurred with 76 kg N ha−1 for canola yield (2190 kg ha−1) and 47 kg N ha−1 for wheat (2910 kg ha−1). Maximum N uptake occurred at about 90 kg N ha−1 for both crops. Wheat grain yield and N uptake responses were mostly associated with normalized difference vegetation index (NDVI) at anthesis or flag leaf, whereas canola yields and N uptake were most associated with NDVI at five-leaf or bolting, or Cardy Nitrate meter at bolting. The preceding relationships were most apparent at the highest N fertilizer rates. Canola and wheat water use were not affected by N fertilizer rate, but water use efficiency increased linearly for both crops as N fertilizer rate was increased.

scholarly journals Effect of reduced nitrogen fertilizer rate on nitrogen uptake and yield of spinach (Amaranthus spp.)

2020 ◽  
Vol 7 (10) ◽  
pp. 1-7
Author(s):  
Faridah Manaf ◽  
Roslan Ismail ◽  
Arina Shairah Abdul Sukor
Keyword(s):  
N Uptake ◽  
Soil Nutrient ◽  
N Fertilizer ◽  
Leafy Vegetables ◽  
Growth And Yield ◽  
Fertilizer Rate ◽  
N Input ◽  
Nitrogen Fertilizer Rate ◽  
Amaranthus Spp ◽  
N Fertilizer Rate

Reducing nitrogen (N) fertilizer rate have beneficial effect on N uptake by plants. Studies on reducing N rate in sweet potato and beetroot to improve their growth and yield are well documented but the effect of decreased N rate on N uptake by leafy vegetables are limited. A glasshouse experiment was conducted to determine the effect of different N rate on N uptake of green spinach. Treatments evaluated were (i) soil alone, and (ii) different N fertilizer rate (12, 24, 36, 60, 90 and 120 kg N/ha). Treatments were applied at 14 days after seeding (DAS) at a uniform rate of 2 t/ha. Results revealed that moderate N input between 12 to 36 kg N/ha improved N uptake and yield of spinach compared with lower rate of N input (0 to 12 kg N/ha) but higher N level of 90 kg N/ha was most effective in improving N uptake and fresh yield. The effectiveness of N input at 90 kg N/ha corresponded to the optimum retention of soil N resulting in timely availability of N for uptake by spinach leading to higher yield. Although treatment with excess N (120 kg N/ha) improved N uptake, the decline in yield was because of soil nutrient imbalance that inhibited other nutrients required by plants for growth and development. The findings from the study suggest that reducing N fertilizer rate improves N uptake in leafy vegetables without reducing productivity depending on their specific N requirement.

Yield response of forage grasses to N fertilizer as related to spring soil nitrate sorbed on anionic exchange membranes

2000 ◽  
Vol 80 (1) ◽  
pp. 203-212 ◽  
Author(s):  
N. Ziadi ◽  
R. R. Simard ◽  
G. Allard ◽  
G. Parent
Keyword(s):  
N Uptake ◽  
N Fertilizer ◽  
Forage Yield ◽  
Yield Response ◽  
Soil Nitrate ◽  
Forage Grasses ◽  
Fertilizer N ◽  
Fertilizer Rate ◽  
Anionic Exchange ◽  
N Fertilizer Rate

Soil N availability is an important factor in forage grass production. Maximising N fertilizer efficiency is essential to improve profitability and to reduce the environmental risk associated with residual excess soil N. The objectives of this study were (i): to determine the effects of N fertilizer on yield, N uptake and NO3–N concentration of forage grasses produced in Western Quebec; and (ii) to compare spring soil NO3−measured by anionic exchange membranes (NO3AEMs) and by water extraction (NO3w) as a criterion to predict fertilizer N requirements of forage grasses. The yield response of grasses, especially timothy (Phleum pratense L.), to different rates of NH4NO3 (0 to 240 kg N ha−1) on heavy clay soils (Humic Gleysols) was studied from 1994 to 1996 at four sites in the Abitibi-Temiscamingue area, Quebec (Canada). Nitrogen significantly (P < 0.001) increased forage yield, N uptake, and NO3–N concentration. The economically optimum N fertilizer rate (Nop) for forage yield varied from 25 to 240 kg N ha−1 depending on sites and years, and averaged 125 kg N ha−1. The Nop can be predicted more adequately by NO3AEMs (R2 = 0.45) than by NO3w (R2 = 0.09). Based only on the relationship between the relative yield and spring soil nitrate, NO3AEMs could be used as a criterion for fertilizer N recommendation of forage grasses in this cool continental climate. Key words: N fertilizer, nitrate, grass, economically optimum N fertilizer rate

scholarly journals Effect of Mineral Nitrogen and Legume Intercrops on Maize (Zea Mays L.) Nitrogen Uptake, Nutrient Use Efficiency and Yields in Chitedze and Zomba, Malawi

2017 ◽  
Vol 7 (1) ◽  
pp. 64
Author(s):  
Innocent Malunga ◽  
Joyce J. Lelei ◽  
Wilkson Makumba
Keyword(s):  
Zea Mays ◽  
Field Experiments ◽  
Zea Mays L ◽  
Agricultural Research ◽  
N Uptake ◽  
Nutrient Use Efficiency ◽  
N Fertilizer ◽  
Soil Conditions ◽  
Research Station ◽  
Agricultural Research Station

Nitrogen (N) is the most critical plant nutrient. Maize has a high nitrogen demand. Low maize (Zea mays L.), yields in smallholder farms of Malawi, the country’s staple, is attributable to declining N fertility aggravated by the ever increasing price of fertilizer. Little effort has been made to establish the best nitrogen rate in a maize- cowpea and maize-bean intercrop under variable soil conditions as a way of improving production, and was the objective of the current study. Field experiments were conducted at Chitedze Agricultural Research Station in Lilongwe and Makoka Agricultural Research Station in Zomba during the 2016/17 growing season. A split plot layout in a randomized complete block design, with three replicates was used. The main plots were; sole maize, sole bean, sole cowpea, bean/maize and cowpea/maize intercrop systems. The sub plots were N fertilizer rates (0, 52.5, 78.75 and 105 kg N ha-1), applied as urea. The data collected was subjected to analysis of variance using SAS software version 9.3 (SAS Institute Inc.) at P<0.05. Means were separated using Duncan Multiple Range (DMRT) test at 95% significance level. The results showed that application of N increased maize N uptake and grain yield. NUE however decreased with increasing N fertilizer rate.

Citrus Carbohydrate Levels were Related to Irrigation Frequency but Not Arbuscular Mycorrhizal Fungal (AMF) Inoculum

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 498a-498
Author(s):  
Matthew W. Fidelibus ◽  
Chris A. Martin
Keyword(s):  
Soil Water ◽  
Arbuscular Mycorrhizal ◽  
Irrigation Frequency ◽  
Soil Water Tension ◽  
Root Starch ◽  
Carbohydrate Levels ◽  
Amf Communities ◽  
Sugar Levels ◽  
Shoot Mass ◽  
Water Tension

Sugar and starch concentrations in leaves and roots of Citrus volkameriana Tan and Pasq were measured in response to irrigation frequency and AMF inoculum. Non-mycorrhizal seedlings were treated with a soil inoculum from one of five different communities of AMF; two AMF communities from Arizona citrus orchard soils, and three communities from undisturbed desert soils. Plants were assigned to frequent (soil water tension > –0.01 MPa) or infrequent (soil water tension > –0.06 MPa) irrigation cycles and were container-grown in a glasshouse for 4 months before tissues were analyzed. Fungal inoculum source did not affect shoot or root carbohydrate levels. Plants grown under high irrigation frequency had increased leaf and root starch levels and increased root sugar levels compared with those under low irrigation frequencies. High irrigation frequency also increased shoot mass.

scholarly journals Corralling, planting density, and N fertilizer rate effect on soil properties, weed diversity, and maize yield

2018 ◽  
Vol 43 (3) ◽  
pp. 243-260
Author(s):  
Nurudeen Abdul Rahman ◽  
Asamoah Larbi ◽  
Andrews Opoku ◽  
Francis Marthy Tetteh ◽  
Irmgard Hoeschle-Zeledon
Keyword(s):  
Soil Properties ◽  
Maize Yield ◽  
Rate Effect ◽  
N Fertilizer ◽  
Planting Density ◽  
Fertilizer Rate ◽  
Weed Diversity ◽  
N Fertilizer Rate
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