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35 results on '"Zhou, Baoyuan"'

15. Innovation of the double-maize cropping system based on cultivar growing degree days for adapting to changing weather conditions in the North China Plain

Author

Ming Zhan, Zhou Baoyuan, Guo-rui Li, Wei Ma, Fei Xia, Qing-feng Meng, Zhao Ming, Cougui Cao, and Dan Wang

Subjects
0106 biological sciences, Plant growth, Agriculture (General), North china, Plant Science, Biology, 01 natural sciences, Biochemistry, S1-972, Animal science, Food Animals, North China Plain, Dry matter, Cultivar, Cropping system, double-maize cropping system, Ecology, grain yield, 04 agricultural and veterinary sciences, Growing degree-day, Production efficiency, weather conditions, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Grain yield, Animal Science and Zoology, Agronomy and Crop Science, 010606 plant biology & botany, Food Science
Abstract

Double-maize cropping system is an effective option for coping with climate change in the North China Plain. However, the effects of changes in climate on the growth and yield of maize in the two seasons are poorly understood. Forty-six cultivars of maize with different requirements for growing degree days (GDD), categorized as high (H), medium (M) or low (L), and three cultivar combinations for two seasons as LH (using JD27 and DMY1 from category L in the first season; and YD629 and XD22 from category H in the second season), MM (using JX1 and LC3 from category M in the first season; and ZD958 and JX1 from category M in the second season) and HL (using CD30 and QY9 from category H in the first season; and XK10 and DMY3 from category L in the second season) were tested to examine the eco-physiological determinants of maize yield from 2015 to 2017. The correlations between the combinations of cultivars and grain yield were examined. The combination LH produced the highest annual grain yield and total biomass, regardless of the year. It was followed, in decreasing order, by MM and HL. Higher grain yield and biomass in LH were mainly due to the greater grain yield and biomass in the second season, which were influenced mainly by the lengths of the pre- and post-silking periods and the rate of plant growth (PGR). Temperature was the primary factor that influenced dry matter accumulation. In the first season, low temperatures during pre-silking decreased both the duration and PGR in LH, whereas high temperatures during post-silking decreased the PGR in MM and HL, resulting in no significant differences in biomass being observed among the three combinations. In the second season, high temperatures decreased both the PGR and pre- and post-silking duration in MM and HL, and consequently, the biomass of those two combinations were lower than that in LH. Moreover, because of lower GDD and radiation in the first season and higher grain yield in the second season, production efficiency of temperature and radiation (Ra) was the highest in LH. More importantly, differences in temperature and radiation in the two seasons significantly affected the rate and duration of growth in maize, and thereby affecting both dry matter and grain yield. Our study indicated that the combination of LH is the best for optimizing the double-maize system under changing climatic conditions in the North China Plain.

Published
2020

24. Long-term excessive nitrogen application decreases spring maize nitrogen use efficiency viasuppressing root physiological characteristics

Author

Ren, Hong, Liu, Zheng, Wang, Xinbing, Zhou, Wenbin, Zhou, Baoyuan, Zhao, Ming, and Li, Congfeng

Abstract

Long-term excessive nitrogen (N) application does not increase or even decreases grain yield and N use efficiency (NUE) of maize, in which the roles of root morphological and physiological characteristics are not clear. The goal of this study was to explain the mechanism underlying no increment in grain yield under excessive N application from the perspective of root morpho-physiological characteristics. A 10-year long-term N fertilizer trial was conducted in Jilin Province, Northeast China, growing maize at three N fertilizer levels (zero N, N0; recommended N, N2; and high N level, N4) in 2019, 2020 and 2021. Two widely planted maize genotypes: ‘Xianyu 335’ (XY335) and ‘Zhengdan 958’ (ZD958) were used. Grain yield, N content, root morphology and other physiological characteristics were analyzed to further evaluate the relationships between N uptake, N utilization, plant growth, and root systems under different N treatments. Compared with N0, root biomass, post-silking N uptake and grain yield were significantly improved with increased N input, whereas no significant differences were observed between recommended N and high N. High N application increased root length and root surface area, but decreased root activity (measured by TTC (2,3,5-triphenyltetrazolium chloride) method), nitrate reductase activity and root activity absorbing area regardless of genotypes. Root length and root to shoot ratio negatively contributed to N uptake (by -1.2% and -24.6%), while root surface area, root activity, nitrate reductase activity and root activity absorbing area were positively contributed to N uptake. The interaction effect between cultivar and N application was significant on NUE. XY335 obtained the highest NUE (11.6%) and N recovery efficiency (18.4%) through higher root surface area (23.6%), root activity (12.5%), nitrate reductase activity (8.3%) and root activity absorbing area (6.9%) compared with other treatments. Overall, recommended N application promoted Post N uptake, NUE and grain yield by root surface area and root activity, nitrate reductase activity and root activity absorbing area, while high N application did not increase or even decreased NUE by reducing root surface area, root activity, nitrate reductase activity and root activity absorbing area. Our case study successfully revealed that root surface area, root activity, nitrate reductase activity and root activity absorbing area were the limiting factors of NUE increase under high N application.

Published
2024
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33. Traumatic bifrontoparietal extradural hematomas with detachment of superior sagittal sinus: a case report and review of the literature.

Author

Hou, Boru, Guo, Xiumei, Wang, Dengfeng, Zhang, Yinian, Zhao, Zhiyong, Yang, Wenzhen, Wang, Gang, Yan, Guizhong, Zhou, Baoyuan, and Ren, Haijun

Subjects
HEMATOMA, EPIDURAL hematoma, LITERATURE reviews
Abstract

A 45-year-old man suffered bifrontoparietal extradural hematoma resulting from head injury, which cause superior sagittal sinus detachment from its subperiosteal loggia. We present the patient who was treated by early surgical evacuation of the hematoma with an excellent outcome and we also perform a review of the current literature. [ABSTRACT FROM AUTHOR]

Published
2019
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35. Effects of Straw-Return Method for the Maize–Rice Rotation System on Soil Properties and Crop Yields.

Author

Han, Yuling, Ma, Wei, Zhou, Baoyuan, Yang, Xiaolong, Salah, Akram, Li, Congfeng, Cao, Cougui, Zhan, Ming, and Zhao, Ming

Subjects
CROP yields, RICE straw, CORN yields, ROTATIONAL motion, SOILS, SOIL density
Abstract

Exploring suitable maize straw-return measures is essential for the new double-cropping system of maize (Zea mays L.)–rice (Oryza sativa L.) rotation in the middle reaches of Yangtze River in China, which can increase crop yield by improving soil quality. In this study, four straw-return measures were evaluated by investigating the soil bulk density (BD), organic matter (OM), microbial community, and nutrients from 2016 to 2018. The four straw-return treatments were as follows: (1) no straw-return (CK), (2) only rice straw incorporated into the field (M0Ri), (3) both maize and rice straw incorporated to field (MiRi), and (4) maize straw mulched and rice straw incorporated into the field (MmRi). Compared to CK, two-season crop straw-return treatments changed soil microbial community composition, and increased soil total organic carbon (TOC) and dissolved organic carbon (DOC), microbial biomass carbon (MBC), mineralized nitrogen (Nmin), available phosphorus (P) and exchangeable potassium (K) in the 0–20 cm soil layer by 3.6%, 63.4%, 38.8%, 12.4%, 39.7%, and 21.6%, respectively, averaged across MmRi and MiRi treatments. In addition, MmRi and MiRi increased annual yield by 9.1% and 15.2% in 2017 and 11.7% and 12.9% compared to CK in 2018, respectively. MmRi exhibited superiority in the soil microbial community, enzyme activities, DOC, MBC, Nmin, available P, and exchangeable K in contrast to MiRi. We concluded that MmRi is the best measure to implement for straw-return in maize–rice rotation systems. [ABSTRACT FROM AUTHOR]

Published
2020
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