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Effects of Nitrogen Management on the Yield of Winter Wheat in cold area of Northeastern China

Journal of Integrative Agriculture 2012年第6期11卷 1020-1025页

作者： LI Lian-peng LIU Yuan-ying LUO Sheng-guo PENG Xian-long Resource and Environment College Northeast Agricultural UniversityHarbin 150030P.R.China

A plot experiment including four treatments, CK （N 105 kg ha-1 as urea, including a basal N application of 35 kg ha-I and a topdressing N 70 kg ha-1 at turned green stage） and optimized N management （OPT1, OPT2 and OPT3, applied two-thirds, one-third and two-fifths N at jointing stage, respectively, total N 60 kg ha-l）, was conducted to evaluate the effects of nitrogen management on growth and N uptake of winter wheat （Triticum aestivum）, Dongnong 1, which is the first highly cold tolerant winter wheat in China. Index of population quality, N uptake and yield were determined. The ear-bearing tiller rate was increased by above 12%, and the leaf area index, biomass and N uptake were significantly decreased （P〈O.05） at jointing stage. OPT treatments increased the grain to leaf area ratio at heading stage, the dry matter weight and N uptake after heading by 14.3-27.9%, 11.6-28.7% and 118.1-161.8 %, respectively. The yield of the OPT treatments was increased by 14.2-37.5% compared with CK, and there was a significant difference （P〈0.05） between CK and OPT1 treatments. Harvest index and N partial factor productivity （PFP, kg grain yield per kg N applied） was clearly enhanced from 0.4 and 35.6 kg, respectively for CK to an average of 0.48 （P〈0.05） and 77.6 kg （P〈0.05） in the OPT treatments. These results indicated that the optimized N management increased the harvest index, yield and N use efficiency by decreasing the N application rate and postponing N application time, improved wheat population quality, controlled excessive growth in the vegetative stages and increased dry matter and N accumulation rates after heading.

关键词： cold area winter wheat (Triticum aestivum) N management population quality yield

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Effects of Rice Yield and Quality Across Accumulated Temperature Zone Planting in cold area

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Journal of Northeast Agricultural University(English Edition) 2015年第2期22卷 1-7页

作者： Wang Qiu-ju Liu Feng Gao Pan Gao Zhong-chao Chang Ben-chao Liu Yan-xia Zhang Li-li Soil Fertilizer and Environment Resources Institute Heilongjiang Academy of Agriculture Sciences Heilongjiang Academy of Agricultural Sciences College of Agriculture Northeast Agricultural University

Five rice varieties were planted to determine the variation of the yield and quality traits in five different regions in a cold area of China. The results showed that the number of the panicles, the number of grains per panicle and percentage of head-milled rice displayed quadratic curves against the accumulated temperature, and the sterile rate decreased with greater accumulated temperature. However, 1 000-grain weight had no correlation with the accumulated temperature and protein content, amylose content and taste also had no obvious relation with the accumulated temperature. The results from the accumulated temperature differed with rice variety, so the temperature insensitive type variety should be proposed for production.

关键词： rice yield accumulated temperature cold area

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Discussion on the model of community management of chronic diseases in cold areas

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Frigid Zone Medicine 2021年第1期1卷 17-22页

作者： Rui Jiang Yuquan Zhao Yongchen Wang Department of General Practice the Second Affiliated Hospital of Harbin Medical UniversityHarbin150001China Heilongjiang Academy of Traditional Chinese Medicine Harbin 150001China

Because of the overbearing low temperature,cold areas increase the morbidity and mortality of chronic non-communicable diseases(chronic diseases)in exposed *** the growth of the aging population and the superposition of lifestyle risk factors,the number of people with chronic diseases in cold areas is climbing,and the family and social burdens are *** health-threatening circumstances in the cold areas render the general practitioners to face serious challenges and difficulties in the community management of chronic *** paper summarizes the current situation of chronic disease management in cold areas and explores the relevant management models so as to provide a useful reference for regional health construction,graded diagnosis and treatment,and prevention and control of chronic diseases in China.

关键词： cold area chronic disease community management general practitioner

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Landfill leachate production, quality and recirculation treatment in northeast China

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Journal of Environmental Sciences 2006年第4期18卷 625-628页

作者： ZHAO Qing-liang LIU Xue-yan QI Xu-dong LIU Zhi-gang School of Municipal and Environment Engineering Harbin Institute of Technology Harbin 150090 China

Landfill leachate recirculation treatment process is a promising and economic way in northeast China due to the distinct season variation. In order to study the impact of recirculation on leachate production and its quality, two simulated sanitary landfill reactors, one with leachate recirculation and the other without, were placed outdoor in Harbin. The two-year experimental results indicated that leachate production was reduced by 86% with leachate recirculation and less or no facility for leachate treatment required. Recirculation could improve the leachate quality dramatically with lower COD, SS, NF4-N and higher pH level. Recirculation also could enhance waste degradation and stabilization and improve the efficiency of landfill. This study confirmed that leachate recirculation was a very feasible way for on-site landfill leachate treatment in cold areas.

关键词： cold area sanitary landfill leachate recirculation solid waste

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