scholarly journals Zeolite increases grain yield and potassium balance in paddy fields

Geoderma ◽  
2022 ◽  
Vol 405 ◽  
pp. 115397
Author(s):  
Yinghao Li ◽  
Guimin Xia ◽  
Qi Wu ◽  
Wei Chen ◽  
Wenhua Lin ◽  
...  
Keyword(s):  
Grain Yield ◽  
Paddy Fields ◽  
Potassium Balance

scholarly journals Performances of Sheet-Pipe Typed Subsurface Drainage on Land and Water Productivity of Paddy Fields in Indonesia

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 48
Author(s):  
Chusnul Arif ◽  
Budi Indra Setiawan ◽  
Satyanto Krido Saptomo ◽  
Hiroshi Matsuda ◽  
Koremasa Tamura ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Productivity ◽  
Type System ◽  
Soil Surface ◽  
Subsurface Drainage ◽  
Crop Productivity ◽  
Paddy Fields ◽  
Soil Conditions ◽  
Rice Varieties ◽  
Soil Aeration

Subsurface drainage technology may offer a useful option in improving crop productivity by preventing water-logging in poor drainage paddy fields. The present study compared two paddy fields with and without sheet-pipe type subsurface drainage on land and water productivities in Indonesia. Sheet-pipe typed is perforated plastic sheets with a hole diameter of 2 mm and made from high-density polyethylene. It is commonly installed 30–50 cm below the soil surface and placed horizontally by a machine called a mole drainer, and then the sheets will automatically be a capillary pipe. Two fields were prepared, i.e., the sheet-pipe typed field (SP field) and the non-sheet-pipe typed field (NSP field) with three rice varieties (Situ Bagendit, Inpari 6 Jete, and Inpari 43 Agritan). In both fields, weather parameters and water depth were measured by the automatic weather stations, soil moisture sensors and water level sensors. During one season, the SP field drained approximately 45% more water compared to the NSP field. Thus, it caused increasing in soil aeration and producing a more significant grain yield, particularly for Inpari 43 Agritan. The SP field produced a 5.77 ton/ha grain yield, while the NSP field was 5.09 ton/ha. By producing more grain yield, the SP field was more effective in water use as represented by higher water productivity by 20%. The results indicated that the sheet-pipe type system developed better soil aeration that provides better soil conditions for rice.

scholarly journals Chemical Weed Control in Paddy Fields Inoculated with Azospirillum lipoferum

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
A. SEDDIGUI KIASARI ◽  
H. AMINPANAH ◽  
P. SHARIFI
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
Paddy Fields ◽  
Azospirillum Lipoferum ◽  
Northern Iran ◽  
Growing Period ◽  
Management Regime ◽  
Significant Difference ◽  
Hand Weeding

ABSTRACT: Herbicides, as a major part of weed control strategy in paddy fields, have different impact on growth and activity of soil-beneficial bacteria such as Azospirillum species. A field experiment was conducted at Sefid Rood Livestock and Agricultural Company, northern Iran, to investigate the possibility of chemical weed control in paddy fields inoculated with Azospirillum lipoferum. The experiment was designed in a factorial arrangement based on a randomized complete block with three replicates. The factors were Azospirillum application (inoculation with or without Azospirillum lipoferum) and weed management regime (butachlor application with supplementary hand-weeding, bensulfuron methyl application with supplementary hand-weeding, combination of butachlor and bensulfuron methyl application with supplementary hand-weeding, hand-weeding at 15, 30, and 45 days after transplanting, and no weeding [not weeded during the rice-growing period). The results showed that plants inoculated with A. lipoferum produced 19% higher grain yield compared to plants that were not inoculated. The highest grain yields were recorded for plots treated with butachlor with supplementary hand-weeding (4,512 kg ha-1) and for those treated with a combination of butachlor and bensulfuron methyl with supplementary hand-weeding (4500.5 kg ha-1). The lowest yield (3494.3 kg ha-1) was recorded for weedy plots. No significant interaction was detected between A. lipoferum application and weed management regime for grain yield, indicating that the herbicides had no adverse effect on the efficiency of A. lipoferum in promoting growth and grain yield of rice. There was no significant difference in the dry weights of weed between inoculated and non-inoculated plots. The dry weights of weed in hand-weeded and herbicide-treated plots were significantly lower than that of the weedy plot. In conclusion, the result of this experiment confirms the possibility of chemical weed control in paddy fields inoculated with A. lipoferum.

scholarly journals Canopy Hyperspectral Sensing of Paddy Fields at the Booting Stage and PLS Regression can Assess Grain Yield

2018 ◽  
Vol 10 (8) ◽  
pp. 1249 ◽  
Author(s):  
Kensuke Kawamura ◽  
Hiroshi Ikeura ◽  
Sengthong Phongchanmaixay ◽  
Phanthasin Khanthavong
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Predictive Accuracy ◽  
Oryza Sativa L ◽  
Paddy Fields ◽  
Coefficient Of Determination ◽  
Growth Stages ◽  
Rice Grain ◽  
Pls Regression ◽  
Booting Stage

Canopy hyperspectral (HS) sensing is a promising tool for estimating rice (Oryza sativa L.) yield. However, the timing of HS measurements is crucial for assessing grain yield prior to harvest because rice growth stages strongly influence the sensitivity to different wavelengths and the evaluation performance. To clarify the optimum growth stage for HS sensing-based yield assessments, the grain yield of paddy fields during the reproductive phase to the ripening phase was evaluated from field HS data in conjunction with iterative stepwise elimination partial least squares (ISE-PLS) regression. The field experiments involved three different transplanting dates (12 July, 26 July, and 9 August) in 2017 for six cultivars with three replicates (n = 3 × 6 × 3 = 54). Field HS measurements were performed on 2 October 2017, during the panicle initiation, booting, and ripening growth stages. The predictive accuracy of ISE-PLS was compared with that of the standard full-spectrum PLS (FS-PLS) via coefficient of determination (R2) values and root mean squared errors of cross-validation (RMSECV), and the robustness was evaluated by the residual predictive deviation (RPD). Compared with the FS-PLS models, the ISE-PLS models exhibited higher R2 values and lower RMSECV values for all data sets. Overall, the highest R2 values and the lowest RMSECV values were obtained from the ISE-PLS model at the booting stage (R2 = 0.873, RMSECV = 22.903); the RPD was >2.4. Selected HS wavebands in the ISE-PLS model were identified in the red-edge (710–740 nm) and near-infrared (830 nm) regions. Overall, these results suggest that the booting stage might be the best time for in-season rice grain assessment and that rice yield could be evaluated accurately from the HS sensing data via the ISE-PLS model.

Priming of rice ( Oryza sativa L.) seedlings with abscisic acid enhances seedling survival, plant growth, and grain yield in saline-alkaline paddy fields

2017 ◽  
Vol 203 ◽  
pp. 86-93 ◽  
Author(s):  
Li-Xing Wei ◽  
Bing-Sheng Lv ◽  
Xiao-Wei Li ◽  
Ming-Ming Wang ◽  
Hong-Yuan Ma ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Abscisic Acid ◽  
Plant Growth ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Seedling Survival ◽  
Paddy Fields

No-tillage effects on grain yield, N use efficiency, and nutrient runoff losses in paddy fields

2016 ◽  
Vol 23 (21) ◽  
pp. 21451-21459 ◽  
Author(s):  
Xinqiang Liang ◽  
Huifang Zhang ◽  
Miaomiao He ◽  
Junli Yuan ◽  
Lixian Xu ◽  
...  
Keyword(s):  
Grain Yield ◽  
N Use Efficiency ◽  
Paddy Fields ◽  
No Tillage ◽  
Nutrient Runoff ◽  
Use Efficiency ◽  
Runoff Losses ◽  
N Use

scholarly journals Influence of Zeolite and Phosphorus Applications on Water Use, P Uptake and Yield in Rice under Different Irrigation Managements

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 537 ◽  
Author(s):  
Zheng ◽  
Chen ◽  
Chi ◽  
Xia ◽  
Wu ◽  
...  
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Use ◽  
Irrigation Management ◽  
P Uptake ◽  
Paddy Fields ◽  
P Deficiency ◽  
Plant P Uptake ◽  
The Impact ◽  
Reduced Water

Phosphorus (P) deficiency often occurs in paddy fields due to its high fixation, and low solubility and mobility in soils, especially under water stress. Available soil P and plant P uptake could be improved through the application of zeolite. However, little is known about the impact of zeolite on P uptake in rice under water stress. A two-year lysimetric experiment using a split-split plot design investigated the effects of zeolite (0 or 15 t ha−1) and P (0 or 60 kg ha−1) applications on water use, P uptake, and grain yield in rice under two irrigation management systems (continuous flooding irrigation (CF) and improved alternate wetting and drying irrigation (IAWD)). Both irrigation systems produced equivalent effective panicles and grain yield. Compared with CF, IAWD reduced water use and aboveground P uptake and improved water-use efficiency (WUE) in rice. The applications of zeolite or P alone increased grain yield, WUE, soil available P, and stem, leaf, and panicle P concentration, and aboveground P uptake, but had no significant effect on water use. The enhanced grain yield induced by zeolite was related to the increase in aboveground P uptake. The zeolite application enhanced NH4+–N retention in the topsoil and prevented NO3−–N from leaching into deeper soil layers. Moreover, Zeolite made lower rates of P fertilizer possible in paddy fields, with benefits for remaining P supplies and mitigating pollution due to excessive P. These results suggest that the combined application of zeolite and P under improved AWD regime reduced water use, improved P uptake and grain yield in rice, and alleviated environment risk.

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