Evaluating regional mean optimal nitrogen rates in combination with indigenous nitrogen supply for rice production

2012 ◽  
Vol 137 ◽  
pp. 37-48 ◽  
Author(s):  
Weini Wang ◽  
Jianwei Lu ◽  
Tao Ren ◽  
Xiaokun Li ◽  
Wei Su ◽  
...  
Keyword(s):  
Nitrogen Supply ◽  
Rice Production ◽  
Nitrogen Rates ◽  
Indigenous Nitrogen Supply

scholarly journals Response of rice production to elevated [CO2] and its interaction with rising temperature or nitrogen supply: a meta-analysis

2015 ◽  
Vol 130 (4) ◽  
pp. 529-543 ◽  
Author(s):  
Jinyang Wang ◽  
Cong Wang ◽  
Nannan Chen ◽  
Zhengqin Xiong ◽  
David Wolfe ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Meta Analysis ◽  
Nitrogen Supply ◽  
Rice Production

Soil organic matter and the indigenous nitrogen supply of intensive irrigated rice systems in the tropics

1996 ◽  
Vol 182 (2) ◽  
pp. 267-278 ◽  
Author(s):  
K. G. Cassman ◽  
A. Dobermann ◽  
P. C. Sta Cruz ◽  
G. C. Gines ◽  
M. I. Samson ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Nitrogen Supply ◽  
Irrigated Rice ◽  
The Tropics ◽  
Indigenous Nitrogen Supply

Rice production with minimal irrigation and no nitrogen fertilizer by intensive use of treated municipal wastewater

2014 ◽  
Vol 70 (3) ◽  
pp. 510-516 ◽  
Author(s):  
Ayumi Muramatsu ◽  
Toru Watanabe ◽  
Atsushi Sasaki ◽  
Hiroaki Ito ◽  
Akihiko Kajihara
Keyword(s):  
Nitrogen Fertilizer ◽  
Municipal Wastewater ◽  
Irrigation System ◽  
Nitrogen Supply ◽  
Rice Production ◽  
Paddy Fields ◽  
Treated Wastewater ◽  
Cultivation System ◽  
Treated Municipal Wastewater ◽  
New System

We designed a new cultivation system of rice with circulated irrigation to remove nitrogen from treated municipal wastewater effectively and assessed the possibility of nitrogen removal in the new system without any adverse effects on rice production through bench-scale experiments through two seasons. Overgrowth of the rice plant, which can lead to lodging and tasteless rice, was found in the first season probably because nitrogen supply based on standard practice in normal paddy fields was too much in the closed irrigation system. In the second season, therefore, the amount of treated wastewater initially applied to the system was reduced but this resulted in a considerably decreased yield. On the other hand, the taste of the rice was significantly improved. The two-season experiments revealed that the new system enabled rice production with minimal irrigation (approximately 50% on the yield base compared to normal paddy fields) and no nitrogen fertilizer. The system also achieved >95% removal of nitrogen from the treated wastewater used for circulated irrigation. The accumulation of harmful metals in the rice was not observed after one season of cultivation in the new system. The accumulation after cultivation using the same soil repeatedly for a longer time should be examined by further studies.

Quantifying spatial variability of indigenous nitrogen supply for precision nitrogen management in small scale farming

2011 ◽  
Vol 13 (1) ◽  
pp. 45-61 ◽  
Author(s):  
Qiang Cao ◽  
Zhenling Cui ◽  
Xinping Chen ◽  
Raj Khosla ◽  
Thanh H. Dao ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Nitrogen Supply ◽  
Nitrogen Management ◽  
Small Scale ◽  
Indigenous Nitrogen Supply

The influence of fertiliser nitrogen application on development and number of reproductive primordia in field-grown two- and six-rowed barleys

2004 ◽  
Vol 55 (3) ◽  
pp. 357 ◽  
Author(s):  
Sebastián Arisnabarreta ◽  
Daniel J. Miralles
Keyword(s):  
Unit Area ◽  
Nitrogen Supply ◽  
Heading Time ◽  
Grain Number ◽  
Nitrogen Rate ◽  
Barley Cultivars ◽  
Leaf Emergence ◽  
Number Of Leaves ◽  
Nitrogen Rates ◽  
Phenological Phases

A field experiment using different 2- and 6-rowed barley cultivars grown at two contrasting nitrogen supply rates (40 and 150 kg N/ha) without water restrictions was carried out to explore how the number of leaf primordia and the rate of leaf emergence interact to modify the duration of different pre-heading phenological phases, and to analyse the dynamics of initiation and mortality of different subcomponents of grain number per unit area, in response to different fertiliser nitrogen regimes.The lower nitrogen supply (40 kg N/ha) delayed heading time as a consequence of higher phyllochron, without any effect on the final number of leaves initiated in the apex. The different fertiliser nitrogen rates only altered the co-ordination between tiller appearance and leaf emergence in two of the 6-rowed cultivars, whereas for the rest of the cultivars, co-ordination between leaf emergence and primary tiller appearance was not altered by fertiliser nitrogen rate. The lower nitrogen supply resulted in less fertile florets per ear due to a reduction in floret primordia survival, without any effect on the maximum number of spikelet primordia initiated in the apex. The higher floret abortion observed in 6-rowed compared with 2-rowed cultivars could be associated with the fact that lateral floret primordia, in those apical and basal positions within the ear in 6-rowed cultivars, are poorly developed with respect to the central spikelets.

Evaluation of use of fly ash-gypsum mixture for rice production at different nitrogen rates

2003 ◽  
Vol 49 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Yang Bok Lee ◽  
Ho Sung Ha ◽  
Kyung Dong Lee ◽  
Ki Do Park ◽  
Young Son Cho ◽  
...  
Keyword(s):  
Fly Ash ◽  
Rice Production ◽  
Nitrogen Rates

scholarly journals Multiple Effects of Nitrogen Fertilization on Grape Vegetative Growth, Berry Quality and Pest Development in Mediterranean Vineyards

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 530
Author(s):  
Arturo Cocco ◽  
Luca Mercenaro ◽  
Enrico Muscas ◽  
Alessandra Mura ◽  
Giovanni Nieddu ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Nitrogen Supply ◽  
Soluble Solids ◽  
Anthocyanin Content ◽  
Nitrogen Rate ◽  
Planococcus Ficus ◽  
Berry Quality ◽  
Nitrogen Rates ◽  
Positive Effect ◽  
Grape Yield

Nitrogen is a key macronutrient for the quantitative and qualitative yield of grapes; in addition, it influences the development and reproduction of grape pests. The multiple effects of different nitrogen rates were investigated on the red berry cultivar ‘Carignano’ and the grape pest Planococcus ficus in a two-year field trial. Different amounts of ammonium nitrate were compared: 0, 80 and 160 Units ha−1 for mineral nitrogen. The amount of nitrogen fertilization supplied influenced the nitrogen status of vines and increased the pruning weight and leaf area, as well as the overall grape yield, by increasing the cluster weight. However, doubling the nitrogen rate did not generally increase the vegetative and productive parameters of grapevines. At harvest, nitrogen supply did not influence the anthocyanin content, tritatable acidity, and soluble solids, although the latter parameter showed a clear, yet not significant, decreasing trend. Planococcus ficus exhibited higher fecundity, survival and shorter development time on grapevines provided with nitrogen, whereas its fertility was unaffected by nitrogen fertilization. Ultimately, nitrogen had a direct and positive effect on grape yield and vine mealybug development, highlighting the importance of integrated cultural and pest control practices to promote grape production.

Sign in / Sign up

Export Citation Format

Share Document