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Effects of nitrogen fertilizer and chemical regulation on spring maize lodging characteristics, grain filling and yield formation under high planting density in Heilongjiang Province, China

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Journal of Integrative Agriculture 2021年第2期20卷 511-526页

作者： LIU Xiao-ming GU Wan-rong LI Cong-feng LI Jing WEI Shi College of Agronomy Northeast Agricultural UniversityHarbin 150030P.R.China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China

Now,lodging is a major constraint factor contributing to yield loss of maize (Zea mays L.) under high planting *** regulation and nitrogen fertilizer could effectively coordinate the relationship between stem lodging and maize yield,which significantly reduce lodging and improve the grain *** purpose of this study was to explore the effects of chemical regulation and different nitrogen application rates on lodging characteristics,grain filling and yield of maize under high *** this,we established a field study during 2017 and 2018 growing seasons,with three nitrogen levels of N100 (100 kg ha^(–1)),N200 (200 kg ha^(–1)) and N300 (300 kg ha^(–1)) at high planting density (90 000 plants ha^(–1)),and applied plant growth regulator (Yuhuangjin,the mixture of 3% DTA-6 and 27% ethephon) at the 7th *** results showed that chemical control increased the activities of phenylalanine ammonia-lyase (PAL),tyrosine ammonia-lyase (TAL),4-coumarate:Co A ligase (4CL),and cinnamyl alcohol dehydrogenase (CAD),and increased the lignin,cellulose and hemicellulose contents at the bottom of the 3rd internode,which significantly reduced the lodging *** lignin-related enzyme activities,lignin,cellulose and hemicellulose contents decreased with the increase of nitrogen fertilizer,which significantly increased the lodging *** 200 kg ha^(–1) nitrogen application and chemical control increased the number,diameter,angle,volume,and dry weight of brace *** 200 kg ha^(–1) nitrogen application and chemical control significantly increased the activities of ADP-glucose pyrophosphorylase (AGPase),soluble starch synthase (SSS) and starch branching enzyme(SBE),which promoted the starch accumulation in ***,improved the maximum grain filling rate (V_(max)) and mean grain filling rate (V_(m)),which promoted the grain filling process,significantly increased grain weight and grain number per ear,thus increased the final yield.

关键词： lodging resistance grain filling starch synthesis yield maize

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Straw return and appropriate tillage method improve grain yield and nitrogen efficiency of winter wheat

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Journal of Integrative Agriculture 2017年第8期16卷 1708-1719页

作者： CHEN Jin ZHENG Meng-jing Pang Dang-wei YIN Yan-ping haN ming-ming LI Yan-xia LUO Yong-li XU Xu LI Yong Wang Zhen-lin Agronomy College Shandong Agricultural University/State Key Laboratory of Crop BiologyMinistry of Science and TechnologyTai'an 271018P.R.China

Straw return is an important management tool for tackling and promoting soil nutrient conservation and improving crop yield in Huang-Huai-hai Plain, China. Although the incorporation of maize straw with deep plowing and rotary tillage practices are widespread in the region, only few studies have focused on rotation tillage. To determine the effects of maize straw return on the nitrogen （N） efficiency and grain yield of winter wheat （Triticum aestivum L.）, we conducted experiments in this region for 3 years. Five treatments were tested：（i） rotary tillage without straw return （RT）; （ii） deep plowing tillage without straw return （DT）; （iii） rotary tillage with total straw return （RS）; （iv） deep plowing tillage with total straw return （DS）; （v） rotary tillage of 2 years and deep plowing tillage in the 3rd year with total straw return （TS）. Treatments with straw return increased kernels no. ear-1, thousand-kernel weight （TKW）, grain yields, ratio of dry matter accumulation post-anthesis, and nitrogen （N） efficiency whereas reduced the ears no. ha-1 in the 2011-2012 and 2012-2013 growing seasons. Compared with the rotary tillage, deep plowing tillage significantly increased the grain yield, yield components, total dry matter accumulation, and N efficiency in 2013-2014. RS had significantly higher straw N distribution, soil inorganic nitrogen content, and soil enzymes activities in the 0-10 cm soil layer compared with the DS and TS. However, significantly lower values were ob- served in the 10-20 and 20-30 cm soil layers. TS obtained approximately equal grain yield as DS, and it also reduced the resource costs. Therefore, we conclude that TS is the most economical method for increasing grain yield and N efficiency of winter wheat in Huang-Huai-hai Plain.

关键词： grain yield N efficiency straw return tillage method winter wheat

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模糊值函数的t-余模积分

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模糊系统与数学 2004年第Z1期18卷 98-102页

作者：王瑞省哈明虎中国科学院应用数学研究所北京100080 河北大学数学与计算机学院河北保定071002

给出了模糊值函数关于t-余模、 -分解测度的t-余模、 -积分(简记为 -积分)的定义,并讨论了模糊值函数 -积分的一些性质和单调收敛定理.这种积分是模糊值函数Lebesgue积分的推广,也是实值函数 -积分的推广.

关键词：模糊值函数 -积分性质收敛定理

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一种新的去除视觉文本图像椒盐噪声的算法

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计算机工程与应用 2007年第14期43卷 81-83页

作者：田大增郝永哈明虎河北大学物理科学与技术学院河北保定071002 河北大学数学与计算机学院河北保定071002

针对视觉文本图像,在获取、处理、传输中产生的椒盐噪声,提出一种基于文字笔画特性消除椒盐噪声的新算法。该算法智能判断被处理像素及其邻域内的像素点是否为噪声,从而有效地把文字目标和椒盐噪声加以区分。实验结果显示,相比传统的去... 详细信息

针对视觉文本图像,在获取、处理、传输中产生的椒盐噪声,提出一种基于文字笔画特性消除椒盐噪声的新算法。该算法智能判断被处理像素及其邻域内的像素点是否为噪声,从而有效地把文字目标和椒盐噪声加以区分。实验结果显示,相比传统的去噪和平滑算法,该方法能准确地抑制噪声,同时避免了对文字笔画的影响,减少了对后继识别的干扰。

关键词：椒盐噪声视觉文本图像文字笔画

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Vesicle-bound and free microRNAs in spent cell culture medium and biological fluids

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Advances in Bioscience and Biotechnology 2012年第8期3卷 1091-1095页

作者： Gang Wang Ka-Bik Lai Bonnie Ching-ha Kwan Kai-ming Chow Philip Kam-Tao Li Cheuk-Chun Szeto Department of Medicine & Therapeutics The Chinese University of Hong Kong Hong Kong China

Background: In addition to the control of gene transla- tion intra-cellularly, microRNAs (miRNAs) have been found to exist extracellularly. However, extracellular miRNA identified in previous studies were largely confined to microvesicles. It remains uncertain whether free extracellular miRNA exists. Methods: We quantify a panel of miRNAs (miRNA 200 family, miR-205, and miR-192) in spent culture medium of renal tubular epithelial cells, as well as serum and urine from patients with systemic lupus erythematosus and healthy controls. Microvesicle bound and free miRNA were separated by ultracentrifugation. Results: In spent cell culture medium, we found substantial amount of miR-200a, miR-200b, miR-200c, miR-141, miR-429, miR-205, and miR-192 in microvesicles, as well as the presence of miR-200a, miR-200b, miR-429, miR-205 and miR-192, but not miR-200c or miR-141 as non-vesicle bound free form. In healthy individuals, we found substantial amount of miR-200a, miR-200b, miR-200c, miR-141 and miR-192 in microvesicles from serum and urine, while only miR-141 exists as free form in both serum and urine. There was no significant difference in serum or urinary free miR-141 levels between SLE patients and healthy controls. In SLE patients, urinary free miR-141 level was signifiantly higher than serum. Neither serum nor urinary free miR-141 levels correlated with lupus disease activity. Conclusion: We found miRNA is present extracellularly, both within microvesicles and as free form, in spent cell culture medium, serum and urine. The biological role of extracellular miRNA requires further study.

关键词： Cell Signaling Fibrosis Cytokine

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拟概率空间上学习理论的关键定理和学习过程一致收敛速度的界

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计算机学报 2008年第3期31卷 476-485页

作者：哈明虎冯志芳宋士吉高林庆河北大学数学与计算机学院河北保定071002 廊坊师范学院数学与信息科学系河北廊坊065000 清华大学自动化系北京100084

进一步讨论了拟概率的一些性质,给出了拟概率空间上的拟随机变量及其分布函数、期望和方差的概念及若干性质;证明了拟概率空间上的Markov不等式、Chebyshev不等式和Khinchine大数定律;给出并证明了拟概率空间上学习理论的关键定理和学... 详细信息

进一步讨论了拟概率的一些性质,给出了拟概率空间上的拟随机变量及其分布函数、期望和方差的概念及若干性质;证明了拟概率空间上的Markov不等式、Chebyshev不等式和Khinchine大数定律;给出并证明了拟概率空间上学习理论的关键定理和学习过程一致收敛速度的界,把概率空间上的学习理论的关键定理和学习过程一致收敛速度的界推广到了拟概率空间,为系统地建立拟概率上的统计学习理论与构建支持向量机奠定了理论基础.

关键词：拟概率期望风险泛函经验风险泛函关键定理一致收敛速度的界

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Non-vesicle-bound free microRNAs could enter cells and affect gene expression

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Advances in Bioscience and Biotechnology 2012年第3期3卷 181-185页

作者： Gang Wang Ka-Bik Lai Bonnie Ching-ha Kwa Kai-ming Chow Philip Kam-Tao Li Cheuk-Chun Szeto Department of Medicine & Therapeutics The Chinese University of Hong Kong Hong Kong China

Background: Cell-free microRNAs (miRNAs) exist in body fluid. Previous studies showed that cell-free mi-RNAs are partly bound in microvesicles, and could transfer between cells via fusion with cell membrane. Methods: We quantified the amount of a panel of mi-RNA targets in and outside microvesicles in human proximal tubular epithelial cell (HK2) medium by microarray and real-time quantitative polymerase chain reaction (RT-QPCR). Intercellular miRNA transfer was explored by medium transfer experiments. Results: We identified a portion of cell-free miRNAs that exists as non-vesicle bound, truly naked form. More importantly, these non-vesicle bound free miRNA could transfer between cells and exert biological effects. By miRNA microarray, we showed that the expression of many miRNA targets in HK-2 cells were altered, either up- or down-regulated, after exposure to extrinsic free miRNAs. The miRNA-200 family was the most affected in our model, with a corresponding alteration in the messenger RNA expression of down-stream targets including ZEB1 and vimentin. Conclusion: Our results suggest that free miRNA may serve as an intercellular messenger, a phenomenon that needs further exploration.

关键词： Cell Signaling Fibrosis Cytokine

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Toxicological Evaluation of Chicken-Breast Meat with High-Dose Irradiation

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Journal of Integrative Agriculture 2012年第12期11卷 2088-2096页

作者： ZHU Jia-ting FENG Min YAN Jian-min LIU Chun-quan ha Yi-ming GAO Mei-xu Yang Ping Wang Zhi-dong Wang De-ning LI Shu-rong GU Gui-qiang Institute of Atomic Energy in Application for Agriculture Jiangsu Academy of Agricultural Sciences Institute of Farm Product Processing Jiangsu Academy of Agricultural Sciences Institute of Agro-Products Processing Science&Technology Chinese Academy of Agricultural Sciences

In this paper, toxicity and safety of high-dose irradiated chicken-breast meat were evaluated. For assays of acute toxicity, genetic toxicity, and sub-chronic toxicity, ames test, mice bone marrow erythrocyte micronucleus, and mice sperm abnormality were performed. The results showed that, in the acute oral toxicity tests, median lethal dose （more than 10 000 mg kg-~） in male and female ICR mice showed no toxicological signs. For subacute 30-d oral toxicology of irradiated chicken-breast meat with dose of 10, 15 and 25 kGy in both male and female SD rats, no noticeable toxicological effects were observed. It is concluded that chicken-breast meat with high-dose irradiation has no acute toxicity and no genotoxicity, nor harmful effects on the animal body at the tested dosage range. Therefore, high-dose irradiated chicken-breast meat is safe for pet consumption.

关键词： toxicological assessment chicken-breast meat irradiated high dose

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文化自信与共产主义文明——基于人类文明新形态的创立

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社科纵横 2023年第5期38卷 10-16页

作者：郝明天津大学马克思主义学院天津300350

中国共产党立足于坚定共产主义最高理想与追求实现共产主义现实状况的应然与实然的辩证要求,明确提出并强调必须坚定文化自信,并要以文化自信为精神源泉和动力支撑推动构建人类文明新形态。共产主义文明形态是人类社会演进的理想文明形... 详细信息

中国共产党立足于坚定共产主义最高理想与追求实现共产主义现实状况的应然与实然的辩证要求,明确提出并强调必须坚定文化自信,并要以文化自信为精神源泉和动力支撑推动构建人类文明新形态。共产主义文明形态是人类社会演进的理想文明形态,人类文明新形态的本质内核契合共产主义文明的价值追求,是中国特色社会主义文明形态在新征程的时代体现,是超越以往文明形态的新文明形态,是社会主义文明形态向共产主义文明形态迈进的过渡形态。

关键词：文化自信人类文明新形态共产主义文明

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深刻领会重大意义科学指导办学实践——深刻学习领会习近平新时代中国特色社会主义思想重大意义并以其指导办学实践

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河北工程大学学报（社会科学版） 2019年第3期36卷 5-9页

作者：哈明虎河北工程大学

深刻学习领会习近平新时代中国特色社会主义思想的重大意义,是“不忘初心、牢记使命”主题教育重要内容之一。对习近平新时代中国特色社会主义思想的重大意义深刻把握,为科学指导办学实践提供了行动指南,对于高校教育管理者而言,着力强... 详细信息

深刻学习领会习近平新时代中国特色社会主义思想的重大意义,是“不忘初心、牢记使命”主题教育重要内容之一。对习近平新时代中国特色社会主义思想的重大意义深刻把握,为科学指导办学实践提供了行动指南,对于高校教育管理者而言,着力强化六个方面的意识,坚决贯彻落实习近平关于教育的重要论述,是主题教育如脑入心的重要体现。

关键词：习近平新时代中国特色社会主义思想重大意义 "六种意识" 办学实践

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