Composition of Archaeal Community in a Paddy Field as Affected by Rice Cultivar and N Fertilizer

2009 ◽  
Vol 58 (4) ◽  
pp. 819-826 ◽  
Author(s):  
Liqin Wu ◽  
Ke Ma ◽  
Qi Li ◽  
Xiubin Ke ◽  
Yahai Lu
Keyword(s):  
Paddy Field ◽  
Archaeal Community ◽  
Rice Cultivar ◽  
N Fertilizer

Effect of Paddy-Upland Rotation on Methanogenic Archaeal Community Structure in Paddy Field Soil

2014 ◽  
Vol 69 (1) ◽  
pp. 160-168 ◽  
Author(s):  
Dongyan Liu ◽  
Hiroki Ishikawa ◽  
Mizuhiko Nishida ◽  
Kazunari Tsuchiya ◽  
Tomoki Takahashi ◽  
...  
Keyword(s):  
Community Structure ◽  
Paddy Field ◽  
Archaeal Community ◽  
Field Soil ◽  
Paddy Field Soil

scholarly journals DGGE method for analyzing 16S rDNA of methanogenic archaeal community in paddy field soil

2004 ◽  
Vol 232 (2) ◽  
pp. 153-163 ◽  
Author(s):  
Takeshi Watanabe ◽  
Susumu Asakawa ◽  
Asumi Nakamura ◽  
Kazunari Nagaoka ◽  
Makoto Kimura
Keyword(s):  
16S Rdna ◽  
Paddy Field ◽  
Archaeal Community ◽  
Field Soil ◽  
Paddy Field Soil

scholarly journals Dry Matter Production and Grain Yield of High Yielding Rice Cultivar, Takanari, Directly Seeded in the Paddy Field with an ^|^ldquo;Air-assisted Drill^|^rdquo;

2012 ◽  
Vol 81 (4) ◽  
pp. 414-423 ◽  
Author(s):  
Takehiro Mukouyama ◽  
Takashi Motobayashi ◽  
Tadashi Chosa ◽  
Taiichiro Ookawa ◽  
Masami Furuhata ◽  
...  
Keyword(s):  
Grain Yield ◽  
Paddy Field ◽  
Dry Matter ◽  
Rice Cultivar ◽  
Dry Matter Production ◽  
Matter Production

scholarly journals Runoff loss of nitrogen and phosphorus from a rice paddy field in the east of China: Effects of long-term chemical N fertilizer and organic manure applications

2020 ◽  
Vol 22 ◽  
pp. e01011 ◽  
Author(s):  
Naxin Cui ◽  
Min Cai ◽  
Xu Zhang ◽  
Ahmed A. Abdelhafez ◽  
Li Zhou ◽  
...  
Keyword(s):  
Paddy Field ◽  
Rice Paddy ◽  
Organic Manure ◽  
N Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Rice Paddy Field

scholarly journals Growth and Yield of Kalimantan Landrace Rice and “IPB 8G” as Affected by Dose and Time of Application of Nitrogen Fertilizer

2019 ◽  
Vol 6 (02) ◽  
pp. 129-137
Author(s):  
Faisal Faisal ◽  
Iskandar Lubis ◽  
Ahmad Junaedi ◽  
Sugiyanta Sugiyanta
Keyword(s):  
Nitrogen Fertilizer ◽  
Harvest Index ◽  
Growth Parameters ◽  
Rice Cultivar ◽  
N Fertilizer ◽  
Growth And Yield ◽  
Rice Cultivars ◽  
Vegetative Phase ◽  
Panicle Number ◽  
N Dose

The study aimed to determine the effect of nitrogen fertilizer dose and the frequency of application on the growth and production of landrace rice Kalimantan and a new rice cultivar "IPB 8G". The study was conducted in December 2017 until June 2018 at the Sawah Baru Experimental Field, Bogor Agricultural University, West Java, Indonesia. The experimental design was a split-split plot consisting of three treatment factors, i.e. rice cultivars (main plots), fertilization time (sub-plots) and fertilizing doses (sub-plots). The three rice cultivars used in this trial were local cultivars "Mayas" and "Samarinda", and a newly developed rice cultivar "IPB 8G".  The application rates of Nitrogen were 0, 75, and 150 kg N.ha-1 applied at different phases of rice growth: 50% N dose was applied at planting, 25% N dose at the vegetative phase, and 25% at the primordial phase.  The different rates of N fertilizer were applied four times, 40% at planting, 20% during the vegetative phase, 20% at the primordial phase, and 20% at heading. Each treatment consisted of three replications totalling 54 experimental units. The N fertilizer application gave a significant effect on all growth parameters except for the harvest index. Time of fertilization significantly affected rice panicle number per hill and harvest index. There were significant differences in the growth of the three rice cultivars, except for the number of tillers. Rice crops fertilized three times with a dose of 75 kg N.ha-1 had the highest number of tillers at 5 week after planting, but it was not significantly different from N at 150 kg.ha-1. The highest grain yield of 2.9 t.ha-1 was obtained from "IPB 8G" cultivar fertilized with 75 kg.ha-1 of nitrogen.

Regulating CH4, N2O, and NO emissions from an alkaline paddy field under rice–wheat rotation with controlled release N fertilizer

2021 ◽  
Author(s):  
Ting Lan ◽  
Heng Zhang ◽  
Yong Han ◽  
Ouping Deng ◽  
Xiaoyan Tang ◽  
...  
Keyword(s):  
Controlled Release ◽  
Paddy Field ◽  
N Fertilizer ◽  
No Emissions

scholarly journals Performance of a High-Yielding Modern Rice Cultivar Takanari and Several Old and New Cultivars Grown with and without Chemical Fertilizer in a Submerged Paddy Field

2009 ◽  
Vol 12 (3) ◽  
pp. 365-380 ◽  
Author(s):  
Renante D. Taylaran ◽  
Satomi Ozawa ◽  
Naoko Miyamoto ◽  
Taiichiro Ookawa ◽  
Takashi Motobayashi ◽  
...  
Keyword(s):  
Paddy Field ◽  
Rice Cultivar ◽  
Chemical Fertilizer ◽  
New Cultivars

UPTAKE AND UTILIZATION OF 5-SPLIT NITROGEN TOPDRESSING IN AN IMPROVED AND A TRADITIONAL RICE CULTIVAR IN THE BHUTAN HIGHLANDS

2012 ◽  
Vol 48 (4) ◽  
pp. 536-550 ◽  
Author(s):  
BHIM BAHADUR GHALEY
Keyword(s):  
Rice Cultivar ◽  
N Fertilizer ◽  
Cultivar Differences ◽  
N Recovery ◽  
Fertilizer N ◽  
N Losses ◽  
N Accumulation ◽  
Split Dose ◽  
Use Efficiency ◽  
Partial Factor Productivity

SUMMARYThe uptake of urea fertilizer (NDFF), applied with 150 kg nitrogen (N) ha−1, topdressed in five splits of 30 kg N ha−1 (30 N) each at 7, 26, 45, 70 and 83 days after transplanting (DAT) of rice (Oryza sativa L.), was investigated in an improved (Khangma Maap, KM) and a traditional (Janam, JN) cultivar in Bhutan highlands, using enriched 15N stable isotope. The treatments were arranged in a split–split plot design, with N fertilizer levels as main plots, cultivars as subplots and topdressing treatments as sub-subplots, with all the sub-subplots receiving the same dose except different timing of one split of enriched 15N to determine partial N fertilize use efficiency at each split dose. Although cultivar differences were not recorded in soil N accumulation and in total dry matter N, KM produced 21% higher grain yields compared to JN due to higher grain harvest index and partial factor productivity of N. Irrespective of the cultivars, topdressing timing had significant effects on NDFF, with highest mean N recovery (REN) of 29% of applied 30 N at 45 DAT during active tillering stage, resulting in mean NDFF total (grain + straw) uptake of 8.71 kg N ha−1 compared to least effective topdressing timing at 7 DAT with mean REN of 12% and NDFF total of 3.51 kg N ha−1. In similarity to topdressing at 45 DAT, topdressing at 70 DAT (panicle initiation stage) was equally effective with mean REN of 27% across the cultivars. Hence, fertilizer N topdressing recommendations that combine use of improved cultivars with N applications timed to coincide with maximum crop demand at 45 and 70 DAT, could enhance N fertilizer use efficiency for increased rice yields as well as reduce N losses downstream, which can cause adverse off-site environmental effects.

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