Water Management for Improvement of Rice Yield, Appearance Quality and Palatability with High Temperature During Ripening Period

We investigated the effect of temperature during the ripening period on the rice yield and arsenic (As) concentration in brown rice, using temperature gradient chambers (TGCs). Rice grown in Wagner pots (1/5000a) was placed in three TGCs (each TGC was set at four temperature levels: ambient, mildly-high temperature, moderately-high temperature, and super-high temperature) from one week after heading until harvest. In the TGCs, a range of mean air temperatures was observed in the range of 2 °C above the ambient temperature. There was a significant negative correlation between the brown rice yield and the air and soil temperatures, and the increase in air and soil temperatures resulted in a decrease in the yield. The reduction in yield was significantly mitigated by the application of calcium silicate. The concentration of As in the brown rice was significantly positively correlated with the air and soil temperature, and the concentration of As increased with increasing air and soil temperatures. When calcium silicate was applied, the concentration of As in brown rice was significantly lower at all temperature ranges, and its application was effective in reducing the arsenic concentration even at high temperatures. These results suggest that the application of silicate material may help mitigate the decrease in yield and the increasing As concentration in brown rice even under high-temperature conditions.

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ENHANCING WATER AND FERTILIZER SAVING WITHOUT COMPROMISING RICE YIELD THROUGH INTEGRATED CROP MANAGEMENT

Indonesian Journal of Agricultural Science ◽

10.21082/ijas.v11n2.2010.p65-73 ◽

2013 ◽

Vol 11 (2) ◽

pp. 65 ◽

Cited By ~ 4

Author(s):

I.P. Wardana ◽

A. Gania ◽

S. Abdulrachman ◽

P.S. Bindraban ◽

H. Van Keulen

Keyword(s):

Water Management ◽

Organic Matter ◽

Grain Yield ◽

Rice Yield ◽

Crop Management ◽

Yield Response ◽

Plant Spacing ◽

Crop Establishment ◽

Integrated Crop Management ◽

Establishment Method

<p>Water and fertilizer scarcity amid the increasing need of rice production challenges today’s agriculture. Integrated crop management (ICM) is a combination of water, crop, and nutrient management that optimizes the synergistic interaction of these components aiming at improving resource use efficiency, i.e. high productivity of water, land, and labor. The objectives of the study were to investigate the effects of crop establishment method, organic matter amendment, NPK management, and water management on yield of lowland rice. Five series of experiments were conducted at Sukamandi and Kuningan Experimental Stations, West Java. The first experiment was focused on crop establishment method, i.e. plant spacing and number of seedlings per hill. The second, third, and fourth experiments were directed to study the effect of NPK and organic matter applications on rice yield. The fifth experiments was designed to evaluate the effect of water management on rice yield. Results showed that 20 cm x 20 cm plant spacing resulted in the highest grain yield for the new plant type rice varieties. Organic matter and P fertilizer application did not significantly affect grain yield, but the yield response to P fertilization tended to be stronger with organic matter amendment. Split P application did not significantly increase grain yield. The use of a scale 4 leaf color chart reading resulted in a considerable N fertilizer saving without compromising rice yield. Intermittent irrigation technique saved water up to 55% without affecting yields, resulting in a 2-3 times higher water productivity.</p>

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High Temperature Injury of Ripening in Rice Plant : IV. Effect of high temperature on 14C-assimilation and translocation at an early ripening period

Japanese Journal of Crop Science ◽

10.1626/jcs.45.151 ◽

1976 ◽

Vol 45 (1) ◽

pp. 151-155 ◽

Cited By ~ 5

Author(s):

Kanoe SATO ◽

Kengo INABA

Keyword(s):

High Temperature ◽

Rice Plant ◽

Ripening Period ◽

Early Ripening

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WATER MANAGEMENT AND METHANE EMISSION FROM RICE CULTIVATION: A CASE STUDY IN AN GIANG PROVINCE, VIET NAM

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/54/2a/11916 ◽

2018 ◽

Vol 54 (2A) ◽

pp. 91

Author(s):

Duong Mai Linh

Keyword(s):

Water Management ◽

Global Warming ◽

Rice Yield ◽

Soil Surface ◽

Water Levels ◽

Rice Cultivation ◽

Viet Nam ◽

Ch4 Emission ◽

Wetting And Drying

Rice cultivation causes the emission of CH4 consequenced to the global warming. Reduction of irrigation in rice cultivation is not only saving water resources but also reducing greenhouse gases emission. The objectives of this study was to determine impacts of water management on the emission of CH4 and rice yield. Experiment was conducted in field conditions in An Giang province, Viet Nam with three treatments as continuous flooding (CF), An Giang Alternative Wetting and Drying (AAWD) which is mostly applied by farmers in An Giang province-Viet Nam, and Alternate Wetting and Drying (AWD). Water levels in the field +5 cm, ± 5 cm and -15 cm were controlled higher, fluctuated and lower than soil surface, respectively for CF, AAWD and AWD. CH4 emission determined every week during 13 weeks of the experiment. Rice yield was determined in 1 m2 at the end of the experiment. The results showed that AWD and AAWD, respectively decreased 78.7 % (p < 0.05) and 6.8 % (p > 0.05) CH4 emission compared to the CF 11.9 mg CH4/m2/h. The rice yield of CF was 6.32 ton/ha lower than AAWD 7.8 ton/ha (p < 0.05) but not different with AWD 6.67 ton/ha. AAWD had higher rice yield but same emission than the CF. Farmers in An Giang province should consider application of AWD in rice cultivation in term of saving water and reduction of CH4 emission.

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Respiration, Rather Than Photosynthesis, Determines Rice Yield Loss Under Moderate High-Temperature Conditions

Frontiers in Plant Science ◽

10.3389/fpls.2021.678653 ◽

2021 ◽

Vol 12 ◽

Author(s):

Guangyan Li ◽

Tingting Chen ◽

Baohua Feng ◽

Shaobing Peng ◽

Longxing Tao ◽

...

Keyword(s):

High Temperature ◽

Energy Production ◽

Production Efficiency ◽

Rice Yield ◽

Energy Utilization ◽

Utilization Efficiency ◽

Yield Losses ◽

Maintenance Respiration ◽

Efficient System ◽

Temperature Conditions

Photosynthesis is an important biophysical and biochemical reaction that provides food and oxygen to maintain aerobic life on earth. Recently, increasing photosynthesis has been revisited as an approach for reducing rice yield losses caused by high temperatures. We found that moderate high temperature causes less damage to photosynthesis but significantly increases respiration. In this case, the energy production efficiency is enhanced, but most of this energy is allocated to maintenance respiration, resulting in an overall decrease in the energy utilization efficiency. In this perspective, respiration, rather than photosynthesis, may be the primary contributor to yield losses in a high-temperature climate. Indeed, the dry matter weight and yield could be enhanced if the energy was mainly allocated to the growth respiration. Therefore, we proposed that engineering smart rice cultivars with a highly efficient system of energy production, allocation, and utilization could effectively solve the world food crisis under high-temperature conditions.

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Detection of QTLs for white-back and basal-white grains caused by high temperature during ripening period in japonica rice

Breeding Science ◽

10.1270/jsbbs.65.216 ◽

2015 ◽

Vol 65 (3) ◽

pp. 216-225 ◽

Cited By ~ 13

Author(s):

Takuya Wada ◽

Katsunori Miyahara ◽

Jun-ya Sonoda ◽

Tadashi Tsukaguchi ◽

Masayuki Miyazaki ◽

...

Keyword(s):

High Temperature ◽

Ripening Period

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Efficacy of reduced-rate herbicide combinations in dry-seeded rice (Oryza sativa) on alluvial clay soil

Weed Science ◽

10.1017/s0043174500092614 ◽

1997 ◽

Vol 45 (1) ◽

pp. 151-157 ◽

Cited By ~ 7

Author(s):

David L. Jordan

Keyword(s):

Water Management ◽

Oryza Sativa ◽

Environmental Conditions ◽

Management Practices ◽

Clay Soil ◽

Rice Yield ◽

Economic Returns ◽

Economic Return ◽

Reduced Rate ◽

Alluvial Clay

Research was conducted from 1993 through 1995 to evaluate barnyardgrass control, rice yield, and estimated economic return with POST applications of propanil or propanil + molinate applied alone or with quinclorac. Herbicides were applied under a variety of water management practices and environmental conditions at rates ranging from 1.1 to 3.4, 1.7 to 5.6, and 0.17 to 0.40 kg ai ha−1for propanil, propanil + molinate, and quinclorac, respectively. Reduced-rate combinations of propanil or propanil + molinate with reduced rates of quinclorac controlled small, actively growing barnyardgrass and provided yields and estimated economic returns similar to combinations of these herbicides at higher rates when irrigated. When herbicides were applied to larger barnyardgrass, propanil + molinate at 5.6 kg ha−1was more effective than propanil at 3.4 kg ha−1or quinclorac at 0.40 kg ha−1applied alone. Propanil + molinate applied with quinclorac at 0.28 or 0.40 kg ha−1controlled barnyardgrass more effectively and provided higher yields and greater estimated economic returns than propanil at 3.4 kg ha−1, propanil + molinate at 5.6 kg ha−1, quinclorac at 0.17, 0.28, or 0.40 kg ha−1, or combinations of propanil and quinclorac.

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Effect of Water Management Practices on Rice Yield, Water Productivity and Water Savings under Irrigated Rice Paddy Ecosystem

Journal of Environmental Science and Natural Resources ◽

10.3329/jesnr.v9i2.32161 ◽

2017 ◽

Vol 9 (2) ◽

pp. 79-84 ◽

Cited By ~ 1

Author(s):

SC Barman ◽

MA Ali ◽

HJ Hiya ◽

KR Sarker ◽

MA Sattar

Keyword(s):

Water Management ◽

Water Level ◽

Management Practices ◽

Rice Yield ◽

Water Productivity ◽

Ground Level ◽

Productivity Index ◽

Water Savings ◽

Maximum Water ◽

Irrigation Treatments

A field experiment was carried out during the Boro season 2013 to find out the effects of water management practices on rice yield performance and water productivity index at Old Brahmaputra flood plain paddy land, Muktagacha, Mymensingh. The experiment was laid out in randomized complete block design (RCBD) with six (6) irrigation treatments. Two treatments, T1 and T3 were kept under continuous standing water levels (10 cm and 5 cm respectively) while in treatment T5 irrigation water was supplied for 1st 3 weeks then followed mid season drain out and re-flooded at flowering stage. Three alternate wetting and drying irrigation treatments, T2, T4 and T6 were selected in which irrigation water was applied when water level dropped 20cm, 10cm and 15cm below ground level, respectively. All the irrigation treatments significantly affected the rice yield and yield contributing parameters. The study revealed that the highest grain yield (5950 kg ha-1) was found in treatment T5 which was identical with AWDI treatment T4 (5820 kg ha-1) followed by AWDI treatment T6 (5460 kg ha-1). On the contrary, rice yield of 3350 kg ha-1, 4470 kg ha-1 and 4810 kg ha-1 were found in the treatment T1, T2 and T3, respectively. It was found that AWDI treatment T2 showed maximum water savings (15.1%) followed by T6 (11.3%), T4 (7.59%) and T5 (3.8%), however rice yield in the treatment T2 (4470 kg ha-1) was significantly lower compared to T6, T4 and T5 treatment. Therefore, it may be inferred that treatment T4 (AWDI; irrigation when water level fell 10 cm from ground level), T5 (Irrigation for 1st 3 weeks, then mid-season drain out and re-flooding at flowering) and T6 (AWDI; irrigation when water level fell 15cm from ground level) would be the feasible choice for the water savings, higher rice yield as well as maximum water productivity index (0.478, 0.472 and 0.467, respectively) for sustaining rice farming during the dry Boro season in Bangladesh.J. Environ. Sci. & Natural Resources, 9(2): 79-84 2016

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