Effect of side deep placement of nitrogen on yield and nitrogen use efficiency of single season late japonica rice

Zhao, Can; Huang, Heng; Qian, Zihui; JIANG, Heng-Xin; Liu, Guangming; Xu, Ke; Hu, Yuanyi; Dai, Qigen; ZhongYang, Huo

doi:10.1016/s2095-3119(20)63362-7

Cited by 37 publications

(18 citation statements)

References 45 publications

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“…The changing trends of NH 4 + -N and NO 3 − -N concentrations at points 1# and 2# showed apparent irregularities. Taking NH 4 + -N as an example, the maximum concentration of NH 4 + -N at point 1#, which was 1.11 mg/L, appeared after the first top dressing and the maximum value of NH 4 + -N at point 2#, which was only 0.56 mg/L, appeared after basal fertilizer application, which was mainly caused by uneven fertilization [36,37]. Since there was no runoff in the paddy field within 1 week after topdressing, it can be considered that uneven fertilization does not affect the nitrogen load calculated by the IO method.…”

Section: Analysis Of the Factors Affecting The Concentration Of Pollutantsmentioning

confidence: 99%

Validation of an In-Situ Observation Method for Nonpoint Source Pollution in Paddy Fields: A Case Study of a Beijing Paddy Field

Liao

Jia

et al. 2021

Water

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A Beijing paddy field, along with in-situ experiments, was used to validate and refine the in-situ observation (IO) method to describe nonpoint source pollution (NPS) in paddy fields. Based on synchronous observed rainfall, water depth, and water quality data at two locations (1# (near inlet) and 2# (near outlet)) with large elevation differences, the evapotranspiration and infiltration loss (ET+F), runoff depth and NPS pollution load were calculated according to IO, and a common method was used to calculate ET+F. Then, the results of the different methods and locations were compared and analyzed. The results showed that 1# observation point was located at a lower position compared with 2# observation point. According to 1# observation point, there were 5 days of dry field in the drying period, which was consistent with the actual drying period, and there was a dry period of 9 days based on 2# observation point. The ET+F estimated by IO fit well with the calculated values. In the experiment, 6 overflows and 1 drainage event were identified from the observed data at locations 1# and 2#. The relative deviation of the NPS pollution of total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD), nitrate-nitrogen (NO3−-N) and ammonia nitrogen (NH4+-N) was between 0.6% and 2.0%. The water level gauge location had little influence on IO but mostly affected the water depth observations during the field drying period. The mareographs should be installed in low-lying paddy field areas to monitor water depth variation throughout the whole rice-growing season.

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Section: Analysis Of the Factors Affecting The Concentration Of Pollutantsmentioning

confidence: 99%

Validation of an In-Situ Observation Method for Nonpoint Source Pollution in Paddy Fields: A Case Study of a Beijing Paddy Field

Liao

Jia

et al. 2021

Water

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“…According to Zhao's method [4], at maturity stage, rice yield was determined from all plants in a 6.0 m 2 area (except for border plants) in each plot and was calculated based on a standardized moisture content of 14%.…”

Section: Sampling and Determination Of Rice Yield And Grain-filling Ratementioning

confidence: 99%

“…In order to maximize rice yield, farmers in many parts of the world tend to overuse nitrogen fertilizer in the field. Excessive use of nitrogen fertilizer will not only increase production costs and reduce economic benefits, but also cause serious environmental pollution, including acid rain, soil acidification, and water eutrophication [3,4].…”

Section: Introductionmentioning

confidence: 99%

Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains

et al. 2022

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Nitrogen fertilizer is an important agronomic measure to regulate rice yield and grain quality. Grain filling is crucial for the formation of rice yield and grain quality. However, there are few studies on the effects of excessive nitrogen application (ENA) on grain filling rate and grain quality. A two-year field experiment was conducted to reveal the difference in grain filling characteristics and grain quality of superior grains (SG) and inferior grains (IG), as well as their responses to nitrogen fertilizer. We determined the grain appearance, the rice yield, the grain filling characteristics of SG and IG, and grain quality. We found that with the increasing nitrogen application level, grain yield of both varieties first increased and then decreased. The average yield of excessive nitrogen application (345 kg N ha−1) was 2.68–6.31% lower than that of appropriate nitrogen application (270 kg N ha−1). ENA reduced the grain filling rate by 12.7–25.8%, and the grain filling rate of SG was higher than that of IG. Increasing nitrogen application increased the processing quality and appearance quality of rice grain, but ENA deteriorated the appearance quality, eating quality and nutritional quality. The amylose content and taste value of SS were 3.1–9.7% and 7.1–20.2% higher than those of IS, respectively. The protein components of SG were lower than those of IG. Taken together, our results revealed that ENA leads to the lowering of rice grain yield and grain quality by suppressed grain filling of inferior grains.

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“…The fertilisation is concentrated at a certain lateral depth from the root system of the rice seedlings, which not only avoids injury to the roots or burns to the seedlings, but also facilitates nutrient uptake by the seedlings. The fertilisation is covered by the mud, so that the drainage nutrients are not lost and fertilisation loss is reduced, thus improving the fertilisation efficiency (Wang et al, 2018a;Zhao et al, 2020;Min et al, 2021;Zhong et al, 2021;Chen et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Key Parameters of a Fertilisation Device on Fertilisation Depth

et al. 2022

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In view of the problems of the uneven spatial distribution of particle fertiliser and unstable depths of side-deep fertilisation, caused by existing fertiliser application devices in fertile ditches, the influence of key factors of fertiliser application devices on the depth of fertilisation was studied, in combination with the agronomic characteristics of side-deep fertilisation for the direct seeding of rice in the middle and lower reaches of the Yangtze River. By analysing the incident mud process of fertiliser particles, the factors influencing the impact of mud resistance were determined. Through the theoretical and simulation analysis of the fertilisation device, it was determined that the impact distance, the impact surface radian and the fertiliser particle diameter have the greatest impact on the fertilisation depth of the device. Single factor and orthogonal tests were carried out, with three key factors as test factors and fertilisation depth as the test index. The test results revealed that the influence of the three factors on fertilisation depth follows the order of fertiliser particle diameter > impact distance > impact surface radian. With the maximum fertilisation depth as the objective, the optimal combination of the working parameters was identified as fertiliser particle diameter = 16.0 mm, impact distance = 56.5 mm, and impact surface radian = 29.6°. Furthermore, field tests were carried out in paddy fields with a water content of 37.00 ± 2.60%. When the fertilisation depth was pre-set as 50 mm, the relative error between the pre-set value and actual fertilisation depth was lower than 8.8%. The fertilisation depth can meet the agronomic requirements of side deep fertilisation and the results provide an important reference for the design of a non-contact fertilisation device for direct rice seeding.

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Effect of side deep placement of nitrogen on yield and nitrogen use efficiency of single season late japonica rice

Cited by 37 publications

References 45 publications

Validation of an In-Situ Observation Method for Nonpoint Source Pollution in Paddy Fields: A Case Study of a Beijing Paddy Field

Validation of an In-Situ Observation Method for Nonpoint Source Pollution in Paddy Fields: A Case Study of a Beijing Paddy Field

Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains

Study on the Effect of Key Parameters of a Fertilisation Device on Fertilisation Depth

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