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12 results on '"Yang, Yanshan"'

1. Multi-kernel Non-convex Optimized Weed Identification Method

Author

Ni, Chenggong, Yang, Yanshan, Sun, Yan, Tian, Bin, Liu, Tianquan, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Liu, Qi, editor, Liu, Xiaodong, editor, Cheng, Jieren, editor, Shen, Tao, editor, and Tian, Yuan, editor

Published
2022
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9. Isolation of Agrobacterium tumefaciens/biovar 1 from the crown gall ofCerasus humilisin China

Author

Bai, Jie, Yao, Tuo, Lan, Xiaojun, Yang, Yanshan, Wang, Zhanjun, and Wang, Xinyou

Abstract

As an endemic fruit tree in China, the Chinese dwarf cherry (Cerasus humilis(Bge.) Sok.) has substantial ecological and economic value. In 2018, characteristic symptoms of the crown gall of the Chinese dwarf cherry were observed in a nursery base located in Ningxia Hui Autonomous Region, China. The occurrence of the disease among seedlings was observed to be 9.48%. Diseased plants were collected and brought to the laboratory for the isolation of the pathogens. In this study, the isolates were identified by a combination of morphological, biochemical, pathogenicity-related, as well as molecular methods. The isolated strains were white, circular, domed, and glistening. Using 16S rRNA gene sequence analysis and biochemical tests, five strains were identified as Agrobacterium tumefaciens/ biovar 1. Polymerase chain reaction (PCR) was used to detect pathogenicity-associated genes in isolates through the amplification of the partial nucleotide sequences of tms2, virD2and iptgenes, which proved that the isolates contained the Ti plasmid. In the pathogenicity assay, the crown gall symptom developed on the young stem of tomato and sunflower after inoculation. Based on its morphological, biochemical, pathogenicity and genetic characteristics, the pathogen of the Chinese dwarf cherry crown gall was identified to be A. tumefaciens/biovar 1.

Published
2022
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12. Field experimental study on optimal design of the rotary strip-till tools applied in rice-wheat rotation cropping system

Author

John Fielke, Yang, Yanshan, Fielke, John, Ding, Qishuo, and He, Ruiyin

Subjects
tilth, strip tillage, General Engineering, torque, rice-wheat rotation system, General Agricultural and Biological Sciences, furrow quality, rotary strip-till tool, blade configuration
Abstract

The rice-wheat rotation system plays a significant role in Asian agriculture. The introduction of strip-tillage into the rice-wheat system for wheat planting offers a way to use conservation tillage practices to improve the seedbed quality, retain residue between rows and reduce energy input. A field experiment was conducted using an in-situ test rig. Three types of blade (bent C, straight and hoe) were evaluated in four tool configurations at four rotary speeds (180 r/min, 280 r/min, 380 r/min and 510 r/min) in a paddy soil. Furrow shape parameters, tillage-induced soil structures and energy consumption were assessed. Results showed that the straight blade configuration failed to create a continuous furrow at either 180 r/min or 510 r/min. The bent C blade configuration produced a uniform furrow profile but its furrow backfill was poor and unsuitable for seeding. The hoe blade configuration cut a continuous furrow and better tillage-induced soil structure, but it produced a much wider and non-uniform furrow shape. The mixed blade configuration (central hoe blades with two straight blades aside) provided a uniform furrow with good backfill and fine tilth by utilizing both the cutting effect of straight blades on the furrow boundaries and tensile fracturing of the furrow soil by the hoe blades. The torque of the mixed blade configuration was comparable with the bent C blade but was less than the hoe blades. Hence, a mixed blade configuration was recommended for rotary strip-tillage seeding using in rice-wheat system. Refereed/Peer-reviewed

Published
2018

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