Rice Yield and Physiological Characteristics Under Different Panicle Nitrogen Application Timings in Northeast China

2020 ◽  
Vol 43 (5) ◽  
pp. 413-417
Author(s):  
Dandan Jin ◽  
Jifen Yang ◽  
Wenzhong Zhang ◽  
Wentao Sun ◽  
Jiping Gao ◽  
...  
Keyword(s):  
Northeast China ◽  
Rice Yield ◽  
Physiological Characteristics ◽  
Nitrogen Application

scholarly journals Response of Rice Harvest Index to Different Water and Nitrogen Management Modes in the Black Soil Region of Northeast China

Agriculture ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 115
Author(s):  
Sicheng Du ◽  
Zhongxue Zhang ◽  
Tiecheng Li ◽  
Zhongbo Wang ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Northeast China ◽  
Agricultural Development ◽  
Rice Yield ◽  
Black Soil ◽  
Application Rate ◽  
Nitrogen Management ◽  
Nitrogen Application ◽  
Black Soil Region ◽  
Management Modes ◽  
Nitrogen Application Rate

Understanding the methods leading to rice yield increase is vital for sustainable agricultural development. Improving the harvest index (HI) is an important way to increase rice yield. To explore the effects of different water and nitrogen management modes on the rice HI in the black soil region of Northeast China, a field experiment was conducted in 2019 (Y1) and 2020 (Y2). Two irrigation methods, conventional flooding irrigation (FI) and controlled irrigation (CI), were established in the experiment, and four nitrogen application levels (0 kg/ha, 85 kg/ha, 110 kg/ha, and 135 kg/ha) were set during the entire growth period, named N0, N1, N2, and N3. The dry matter weight and the rice yield at the maturity stage were determined, and the HI was then calculated. The results showed that different irrigation modes and nitrogen application levels had significant effects on the rice HI. Under different irrigation modes with the same nitrogen application level during the two years, the comparison regular of HI was consistent. In Y1 and Y2, the HI of FN0 was 3.36% and 5.02% higher than that of CN0 (p < 0.05), and the HI of CN1 was 0.31% and 2.43% higher than that of FN1 (p > 0.05). The HI under CI was significantly higher than that under FI under N2 and N3 (p < 0.05), the HI of CN2 was 4.21% and 4.97% higher than that of FN2, and the HI of FN3 was 13.12% and 20.34% higher than that of CN3. In addition, during the two-year experiment, the HI first increased and then decreased with an increase in the nitrogen application rate under FI and CI. Under the FI treatments, the HI of N1 was the highest, and that of N2 was the highest under the CI treatments. A variance analysis showed that the irrigation pattern and nitrogen application level had significant interactions on the rice HI (p < 0.01), and the appropriate water and N management mode could increase rice the HI by 26.89%. The experimental results showed that the HI of the 110 kg/ha nitrogen application rate under CI was the highest, reaching 0.574 and 0.572, respectively, in two years. This study provides a data reference and theoretical support for realizing water savings, nitrogen reduction, and sustainable agricultural development in the black soil region of Northeast China.

Crop Management for Increasing Rice Yield and Nitrogen Use Efficiency in Northeast China

2015 ◽  
Vol 107 (5) ◽  
pp. 1682-1690 ◽  
Author(s):  
Xianlong Peng ◽  
Yanming Yang ◽  
Cailian Yu ◽  
Linan Chen ◽  
Mingcong Zhang ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Northeast China ◽  
Rice Yield ◽  
Crop Management ◽  
Nitrogen Use ◽  
Use Efficiency

Nitrogen Use Efficiency and Rice Yield of Different Locations in Northeast China

2017 ◽  
Vol 40 (4) ◽  
pp. 227-232 ◽  
Author(s):  
Dandan Jin ◽  
Jiping Gao ◽  
Peng Jiang ◽  
Xiaohong Lv ◽  
Yan Wang ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Northeast China ◽  
Rice Yield ◽  
Nitrogen Use ◽  
Use Efficiency

CERES-Rice model-based simulations of climate change impacts on rice yields and efficacy of adaptive options in Northeast China

2014 ◽  
Vol 65 (12) ◽  
pp. 1267 ◽  
Author(s):  
Wenxiang Wu ◽  
Qian Fang ◽  
Quansheng Ge ◽  
Mengzi Zhou ◽  
Yumei Lin
Keyword(s):  
Climate Change ◽  
Northeast China ◽  
Rice Yield ◽  
Adaptive Strategies ◽  
Future Climate ◽  
Future Climate Change ◽  
Rice Cultivars ◽  
Rice Yields ◽  
The Impact ◽  
Impacts Of Climate Change

Global temperatures are rising, and concerns about the response of agricultural production to climate change are increasing. Adaptation is a key factor that will shape the severity of impacts of future climate change on food production. Based on actual meteorological, soil and agricultural management data at site scale, the CERES-Rice model, combined with the Regional Climate Model (RCM)-PRECIS, was used to simulate both the effects of climate change on rice yields and the efficacy of adaptive options in Northeast China. The impact simulation showed that rice yield changes ranged from +0.1% to –44.9% (A2 scenario) and from –0.3% to –40.1% (B2 scenario) without considering CO2 fertilisation effects. When considering CO2 fertilisation effects, rice yield reductions induced by temperature increases were decreased at all sites. The CO2 fertilisation effects may partly offset the negative impacts of climate change on rice yields. Adaptive option results revealed that the adverse impacts of climate change on rice yields could be mitigated by advancing the planting dates, transplanting mid–late-maturing rice cultivars to replace early-maturing ones, and breeding new rice cultivars with high thermal requirements. Our findings provide insight into the possible impacts of climate change on rice production, and we suggest which adaptive strategies could be used to cope with future climate change, thus providing evidence-based suggestions for government policy on adaptive strategies.

scholarly journals The Effects of Returning Straw and Milk Vetch on Rice Growth and Greenhouse Gas Emissions

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Lijin Zhang ◽  
Guoqin Huang
Keyword(s):  
Greenhouse Gas ◽  
Rice Yield ◽  
N2o Emission ◽  
Emission Flux ◽  
Nitrogen Application ◽  
Cross Combination ◽  
Ch4 Emissions ◽  
Combined Action ◽  
Set Up ◽  
Late Rice

The effects of different nitrogen application levels on rice yield and greenhouse gas (NO2, CH4) emissions from rice fields under the combined action of straw and milk vetch. Two treatments were set up in the main area of this experiment: R0 (no straw returned to the field, 0); R1 (amount of straw returned to the field under normal conditions, 6000kg·hm-2). Before turning the straw back into the field, use a circular knife to cut the straw into 10~13cm.And 3 kinds of nitrogen application treatments in the sub-district: N1 (no nitrogen application, 0), N2 (nitrogen application, 15 kg·hm-2), N3 (nitrogen application, 30kg·hm-2), two-factor cross-combination,and a non-nitrogen control CK, total of 7 treatments. The results showed that in 2017, early rice R1N2 treatment increased the most obvious yield, which was 32.44% higher than CK, and late rice R1N1 treatment increased the most significantly, which was 17.91% higher than CK. CH4 emissions is positively correlated with the amount of straw returned to the field, while the amount of N2O is the opposite.The N2O emission flux was highest in the treatment of R1N3, and the CH4 emission flux was the highest in the treatment of R1N2.

Integrating remote sensing-based process model with environmental zonation scheme to estimate rice yield gap in Northeast China

2020 ◽  
Vol 246 ◽  
pp. 107682 ◽  
Author(s):  
Jingwen Wang ◽  
Jiahua Zhang ◽  
Yun Bai ◽  
Sha Zhang ◽  
Shanshan Yang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Northeast China ◽  
Process Model ◽  
Rice Yield ◽  
Yield Gap

Effects of continuous nitrogen application on seed yield, yield components and nitrogen-use efficiency of Leymus chinensis in two different saline-sodic soils of Northeast China

2019 ◽  
Vol 70 (4) ◽  
pp. 373 ◽  
Author(s):  
Lihua Huang ◽  
Zhengwei Liang ◽  
Donald L. Suarez ◽  
Zhichun Wang ◽  
Mingming Wang
Keyword(s):  
Seed Yield ◽  
Soil Ph ◽  
Yield Components ◽  
Northeast China ◽  
Application Rate ◽  
Leymus Chinensis ◽  
Nitrogen Application ◽  
Sodic Soils ◽  
N Application ◽  
Application Rates

The effect of nitrogen (N) application on seed yields and yield components in Leymus chinensis (Trin.) Tzvel., a perennial rhizomatous grass, was measured in a field experiment with two saline-sodic soils at Da’an Sodic Land Experiment Station during 2010–11. Two grassland field sites were classified as moderately saline–sodic (MSSL) and severely saline–sodic (SSSL). Application rates of N at each site were 0, 30, 60, 90, 120, 150, 180 and 210 kg ha–1. Application of N significantly improved seed yield mainly through increased spike number (R2 = 0.96, P ≤ 0.001). Compared with nil N, seed yield increased 7.4–10.9 times with N application of 150 kg ha–1 at MSSL, and 5.3–7.5 times with N application of 120 kg ha–1 at SSSL. However, absolute increases at SSSL were relatively small. Some significant differences (P ≤ 0.01) in seed yield occurred between 2010 and 2011 with different N application rates in the same soil, and between MSSL and SSSL in the same year. Increasing N application rate significantly decreased N physiological efficiency (NPE) but increased N apparent-recovery fraction (NRF) and N partial-factor productivity (NPP) at both sites. Seed yield and NPP indicated that the optimal N application rates to increase yield were 150 kg ha–1 at MSSL and 120 kg ha–1 at SSSL. High soil pH was the major factor adversely impacting seed yield, and pH and soil salinity were major factors negative affecting NPE, NRF and NPP as well as decreasing the positive effect of N application. Nitrogen application is a practical and effective method to increase seed yield of L. chinensis in saline-sodic grasslands of Northeast China, particularly when soil pH and salinity are not limiting.

Effect of late nitrogen application on rice yield, grain quality and profitability in the Senegal River valley

2002 ◽  
Vol 17 (3) ◽  
pp. 191-198 ◽  
Author(s):  
M.M. Wopereis-Pura ◽  
H. Watanabe ◽  
J. Moreira ◽  
M.C.S Wopereis
Keyword(s):  
Grain Quality ◽  
Rice Yield ◽  
River Valley ◽  
Nitrogen Application ◽  
Senegal River

scholarly journals Effects of biochar on sodium ion accumulation, yield and quality of rice in saline-sodic soil of the west of Songnen plain, northeast China

2018 ◽  
Vol 64 (No. 12) ◽  
pp. 612-618 ◽  
Author(s):  
Feng Jin ◽  
Cheng Ran ◽  
Qul Aqa Anwari ◽  
Yan Qiu Geng ◽  
Li Ying Guo ◽  
...  
Keyword(s):  
Northeast China ◽  
Rice Yield ◽  
Ion Accumulation ◽  
Sodium Ion ◽  
Songnen Plain ◽  
The West ◽  
Sodic Soil ◽  
Plant Parts ◽  
Yield And Quality

This study evaluated the effects of biochar application on sodium ion accumulation, yield and quality of rice in saline-sodic soil by using a pot experiment. Rice was grown in the soil with no biochar, 15 g biochar per kilogram soil, 30 g biochar per kilogram soil and 45 g biochar per kilogram soil. The results indicated that biochar application significantly decreased sodium ion accumulation of rice plant parts, while it obviously increased rice dry biomass, grain yield and improved rice quality. The results suggested that biochar application to saline-sodic paddy soil has benefits to reduce stress and promote the increase of rice yield and quality formation in saline-sodic soil.

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