scholarly journals Effect of Simulated Flooding and Nitrogen Application on Nitrogen Uptake of Rice

2017 ◽  
Vol 20 (1) ◽  
pp. 67-75
Author(s):  
JA Adjetey ◽  
QS Mulbah
Keyword(s):  
Water Resources ◽  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Production Systems ◽  
Rice Production ◽  
Lowland Rice ◽  
Nitrogen Application ◽  
Nitrogen Use ◽  
Use Efficiency

In lowland rice production systems, flooding patterns vary during the cropping period and this poses a serious challenge to productivity due to the effect of flooding on the availability and uptake of nitrogen. The aim of this study was to examine the influence of various flooding patterns on nitrogen use in rice grown under simulated wetland conditions. Rice was grown in a greenhouse at 0, 110 and 220 kg N ha-1 under well watered control conditions, continuous flooding, early flooding at tillering, and late flooding post-tillering. The results showed that continuous and early flooding increased tiller production and grain yield compared to late flooding or non-flooded conditions. Although the highest grain yields under the different flooding patterns were obtained with 220 kg N ha-1, the combination of 110 kg N ha-1 and early flooding also significantly increased tiller productivity, nitrogen recovery, and agronomic nitrogen use efficiency (NUE). There is the need to regulate the supply of nitrogen and water resources if grain yield and NUE has to be increased at minimal costs. Also, compared to well-watered conditions, rice production under flooded conditions lead to increased productivity and N rate must match realistic target yields. Best results are obtained when flooding occurs in the early rather than later parts of the season.Bangladesh Agron. J. 2017, 20(1): 67-75

scholarly journals Influence of Biodegradable Polymer Coated Urea on Nitrogen Uptake and Utilization of Maize (Zea mays L)

2021 ◽  
pp. 297-306
Author(s):  
B. Balaganesh ◽  
P. Malarvizhi ◽  
N. Chandra Sekaran ◽  
P. Jeyakumar ◽  
K. R. Latha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Biodegradable Polymer ◽  
Dry Matter ◽  
Nitrogen Use ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

Controlled release nitrogen fertilizers could be an excellent management approach for improving nitrogen fertilizer efficiency. The present study aimed to investigate the effect of coated urea fertilizers to increase nitrogen uptake and utilization of maize. The nitrogen use efficiency of maize from various biodegradable polymer-coated urea fertilizers, such as palm stearin coated urea (PSCU), pine oleoresin coated urea (POCU), and humic acid coated urea (HACU), was determined in a pot culture experiment conducted at the Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, during 2021. The coating materials have been coated on urea with different coating thicknesses, viz., PSCU - 5, 10, 15%, POCU – 2, 4, 6%, and HACU - 5, 10, 15%. Among all the treatments, T11: HACU 15% produced highest grain yield (72.0g plant-1) followed by T7: POCU 4% (69.7 g plant-1) and T4: PSCU 10% (69.0g plant-1). In terms of dry matter production, T10: PSCU 10% produced maximum dry matter (186.5g plant-1), followed by T11: HACU 15% (186.2 g plant-1), and T7: POCU 4% (185.3g plant-1). The nitrogen uptake by the maize plant was higher in T7: POCU 4 % (1.62g plant-1), followed by T11: HACU 15% (1.59 g plant-1) and T4: PSCU 10% (1.59g plant-1). Irrespective of treatments, the highest nitrogen utilization by the maize crop was found in T7: POCU 4% (73.9%) followed by T4: PSCU 10% (71.1%) and T11: HACU 15% (70.9%) treatments. When compared to uncoated urea fertilizer, all coated urea fertilizers outperformed uncoated urea fertilizer in terms of grain yield, dry matter accumulation, and nitrogen uptake. To improve the nitrogen use efficiency, coated urea fertilizers prove to be a promising alternative to uncoated urea fertilizers.

Coating of prilled urea with ecofriendly neem (Azadirachta indica A. Juss.) formulations for efficient nitrogen use in hybrid rice

2003 ◽  
Vol 51 (1) ◽  
pp. 53-59 ◽  
Author(s):  
S. Singh ◽  
Y. S. Shivay
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Azadirachta Indica ◽  
Nitrogen Use Efficiency ◽  
Hybrid Rice ◽  
N Recovery ◽  
Panicle Length ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Apparent N Recovery

A field experiment was carried out during the rainy season (June-October) of 1998 at the Research Farm of the Indian Agricultural Research Institute, New Delhi, India to study the effect of coating prilled urea with eco-friendly neem (Azadirachta indica A. Juss.) formulations in improving the efficiency of nitrogen use in hybrid rice. The experiment was laid out in a split-plot design with three replications. Two rice cultivars, hybrid rice (NDHR-3) and Pusa Basmati-1, formed the main plots, with the levels of nitrogen (0, 60, 120 and 180 kg N ha-1) and various forms of urea at 120 kg N ha-1 in the sub-plots. The results obtained in this study showed that the rice hybrid NDHR-3 performed significantly better than the scented variety Pusa Basmati-1 for almost all the agronomic traits tested (growth, yield attributes, grain and straw yields, nitrogen uptake and apparent N recovery) The advantage of grain yield in hybrid NDHR-3 was nearly 16 q/ha over Pusa Basmati-1. Increasing levels of nitrogen significantly increased the number of effective tillers hill-1, panicle length, panicle weight, grain and straw yields and nitrogen uptake, thereby revealing a significant decline in agronomic nitrogen use efficiency (NUE). Among the sources of N, Pusa Neem Golden Urea proved to be significantly superior to other sources with regards to panicle length, grain yield, N uptake, agronomic nitrogen use efficiency and apparent N recovery (%), indicating that coating urea with neem formulations not only increased the grain yield, NUE and apparent N recovery, but also helped to reduce the environmental hazards associated with the use of large amounts of urea.

scholarly journals Shoot and root traits of summer maize hybrid varieties with higher grain yields and higher nitrogen use efficiency at low nitrogen application rates

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7294
Author(s):  
Wennan Su ◽  
Muhammad Kamran ◽  
Jun Xie ◽  
Xiangping Meng ◽  
Qingfang Han ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Root Distribution ◽  
Nitrogen Application ◽  
Nitrogen Use ◽  
Maize Hybrid ◽  
Grain Yields ◽  
Application Rates ◽  
Use Efficiency ◽  
Low Nitrogen

Breeding high-yielding and nitrogen-efficient maize (Zea mays L.) hybrid varieties is a strategy that could simultaneously solve the problems of resource shortages and environmental pollution. We conducted a 2-year field study using four nitrogen application rates (0, 150, 225, and 300 kg N hm−2) and two maize hybrid varieties (ZD958 and QS101) to understand the plant traits related to high grain yields and high nitrogen use efficiency (NUE). We found that ZD958 had a higher grain yield and nitrogen accumulation in the shoots at harvest as well as a higher NUE at lower nitrogen application rates (0 and 150 kg hm–2) than QS101. The grain yields and NUE were almost identical for the two hybrid varieties at nitrogen application rates of 225 and 300 kg N hm–2. Compared with QS101, ZD958 had higher above-ground and below-ground biomass amounts, a deeper root distribution, longer root length, root active absorption area, greater grain filling rate, and higher photosynthetic NUE than QS101 at lower nitrogen application rates. Our results showed that ZD958 can maintain a higher grain yield at lower nitrogen rates in a similar manner to N-efficient maize hybrid varieties. The selection of hybrids such as ZD958 with a deeper root distribution and higher photosynthetic NUE can increase the grain yield and NUE under low nitrogen conditions.

Preanthesis Root Growth and Nitrogen Uptake Improved Wheat Grain Yield and Nitrogen Use Efficiency

2019 ◽  
Vol 111 (6) ◽  
pp. 3048-3056 ◽  
Author(s):  
Hua Guo ◽  
Zhongwei Tian ◽  
Shuzhen Sun ◽  
Yu Li ◽  
Dong Jiang ◽  
...  
Keyword(s):  
Root Growth ◽  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Wheat Grain ◽  
Nitrogen Use ◽  
Use Efficiency
Sign in / Sign up

Export Citation Format

Share Document