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Spatial heterogeneity of plant species on the windward slope of active sand dunes in a semi-arid region of China

Journal of Arid Land 2013年第1期5卷 80-88页

作者： DeMing JIANG ChunPing MIAO XueHua LI XiaoLan LI ALAMUSA QuanLai ZHOU institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate University of Chinese academy of sciences Beijing 100049 China xinjiang academy of agricultural and reclamation sciences Shihezi 832000 China

Species richness and abundance are two important species diversity variables that have attracted particular attention because of their significance in determining present and future species composition conditions. This paper aims to explain the qualitative and quantitative relationships between species diversity pattern and grain size （i.e. size of the sampling unit）, and species diversity pattern and sampling area, and to analyze species diversity variability on active sand dunes in the Horqin Sandy Land, northeastern Inner Mongolia, China. A 50 mx50 m sampling plot was selected on the windward slope, where the dominant species was annual herb Agriophyllum squarrosum. Species composition and abundance at five grain sizes were recorded, and the species-area curves were produced for thirteen grain sizes. The range of values for species abundance tended to increase with in- creasing grain size in the study area, whereas, generally, species richness did not follow this rule because of poor species richness on the windward slope of active sand dunes. However, the homogeneity of species richness in- creased significantly. With the increase in sampling area, species abundance increased linearly, but richness in- creased logarithmically. Furthermore, variograms showed that species diversity on the windward slope of active sand dunes was weakly anisotropic and the distribution pattern was random, according to the Moran Coefficient. The results also showed that species richness was low, with a random distribution pattern. This conflicts with the results of previous studies that showed spatial aggregation in lower richness in a sampling area within a community and inferred that the physical processes play a more important role in species diversity than distribution pattern on active sand dunes. Further research into different diversity patterns and mechanisms between active sand dunes and interdune lowlands should be conducted to better understand biodiversity conservation in

关键词： abundance richness grain size species-area curve variogram Horqin Sandy Land

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Design and Experiment of 1LFQ-325 Pneumatic Reversible Plough

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Asian agricultural Research 2013年第1期5卷 76-78,82页

作者： Xuan ZHENG Xuefeng CHEN Chaomin QIN Li JIAbo JIA machinery and equipment institute of xinjiang academy of agricultural reclamation sciences xinjiang Tianzhen Farm and Pasture machinery Manufacturer

A pneumatic reversible plough is developed, which complements to the tractor of 25.7-36.8 *** plough adopts the cylinder as reversing mechanism between the right and left plough bodies, and the cylinder can substitute the mechanical reversing mechanism. The pneumatic turnover allows the plough to be operated easily and turned over flexibly. Field experiment results show that indicators of plough performance meet the requirements of the relevant national standards.

关键词： Pneumatic Reversible plough Design Experiment

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Favorable haplotypes and associated genes for flowering time and photoperiod sensitivity identified by comparative selective signature analysis and GWAS in temperate and tropical maize

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The Crop Journal 2020年第2期8卷 227-242页

作者： Zhiwei Li Xiaogang Liu Xiaojie Xu Jiacheng Liu Zhiqin Sang Kanchao Yu Yuxin Yang Wenshuang Dai Xin Jin Yunbi Xu institute of Crop Science Chinese Academy of Agricultural SciencesBeijing 100081China International Maize and Wheat Improvement Center(CIMMYT) El Batan 56130TexcocoMexico xinjiang academy of agricultural reclamation Shihezi 832000XinjiangChina Northeast agricultural University Harbin 150030HeilongjiangChina

On the basis of growing environment,maize can largely be classified into temperate and tropical groups,leaving extensive genetic variation and evolutionary signatures in the maize *** identify candidate genes governing flowering time and photoperiod sensitivity,selective signature analysis and SNP-and haplotype-based GWAS were performed using 39,350 high-quality SNP markers in temperate and tropical maize groups consisting of 410 inbred lines phenotyped in three representative experiments in different *** signature analysis revealed 106 selective-sweep regions containing 423 candidate genes involved mainly in biological regulation and biosynthesis *** these genes,25 overlapped with known genes governing flowering time and photoperiod sensitivity and 37 were also detected by GWAS for days to tassel,anthesis-silk interval,and photoperiod sensitivity measured by days to *** two of the candidate genes governing flowering time overlapped selective *** haplotype alleles within significant haplotype loci showed the same direction of effect on flowering time and photoperiod *** inbred lines carrying GATT at HapL499(haplotype locus 499)on chromosome 1 had relatively short flowering *** carrying CA at HapL4054 on chromosome 10,TA at HapL4055 on chromosome 10,and GTTGT at HapL978 on chromosome 2 were less sensitive to photoperiod than lines carrying other haplotype *** loci associated with flowering time and photoperiod sensitivity explained respectively 17.5%–18.6%and 11.2%–15.5%of phenotypic *** genes and favorable haplotypes identified in this study may support the more efficient utilization of maize germplasm groups.

关键词： temperate signature GWAS

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Impact of agricultural residual plastic film on the growth and yield of drip-irrigated cotton in arid region of xinjiang, China

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International Journal of agricultural and Biological Engineering 2020年第1期13卷 160-169页

作者： Can Hu Xufeng Wang Shiguo Wang Bing Lu Wensong Guo Chaoji Liu Xiuying Tang College of Engineering China Agricultural UniversityBeijing 100083China College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina xinjiang academy of agricultural and reclamation Science Mechanical equipment Research institute Shihezi 832000China

Long-term and widespread use of plastic mulching has led to the accumulation of residual plastic film(RPF)in farmland soils of xinjiang,***,there is no specific quantitative basis for RPF pollution or a clear understanding of the influence of residual film on crop *** aim of this study was to investigate the effect of RPF on the growth of cotton,an important cash crop of *** on the field conditions and previous reports,various amount of residual film was applied in 0-30 cm soil *** growth index including emergence rate,dry matter,and yield of cotton was examined at different growth stages under different soil residual film *** demonstrated a significant effect of RPF on soil moisture distribution and *** residues had a significant effect on cotton growth at levels above 200 kg/hm2,and the yield decreased as the RPF amount *** on these findings,200 kg/hm2 was suggested as a threshold level to determine the effects of RPF on *** study provided a basis to rate RPF pollution in farmland soils and help understand the impact of pollution on crop productivity.

关键词： residual plastic film plastic film pollution soil pollution pollution control cotton production management

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Functional characterization of pheromone receptor candidates in codling moth Cydia pomonella(Lepidoptera:Tortricidae)

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Insect Science 2021年第2期28卷 445-456页

作者： Ke Tian Wei Liu Li-Kai Feng Tian-Yu Huang Gui-Rong Wang Ke-Jian Lin State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina institute of Plant Protection Xinjiang Academy of Agricultural and Reclamation ScienceShiheziXinjiang Uygur Autonomous RegionChina Lingnan Guangdong Laboratory of Modern Agriculture Genome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong ProvinceChina

Sex pheromones serve a critical role in Lepidopterans finding *** moths perceive and react to sex pheromones emitted by conspecific females through a delicate pheromone communication *** receptors(PRs)are the key sensory elements at the beginning of that *** codling moth(Cydia ponwonella)is an important pome fruit pest globally and a serious invasive species in *** techniques have been used successfully in monitoring and controlling this *** conducted ribonucleic acid sequencing analysis of the codling moth antennal transcriptome and identified 66 odorant receptors(ORs)in a population from xinjiang province,China,of which 14 were PRs,including two novel PRs(CpomOR2e and CpomOR73).Four PRs that contain full-length open reading frames(CpomORl,OR2a,OR5,OR7)and four PRs with ligands that have not been reported previously(CpomORl,OR2a,OR5,OR7)were selected to deorphanize in the heterologous Xenopus oocyte expression ***,we found that CpomOR2a and CpomOR5 responded to(£,£)-8,10-dodecadien-l-yl acetate(codlemone acetate).Furthermore,CpomOR5(EC50=1.379 x 10-8 mol/L)was much more sensitive to codlemone acetate than CpomOR2a(EC50=1.663×10^(-6) mol/L).Since codlemone acetate is an important component of *** sex pheromone,our results improve the current understanding of pheromone communication in codling moths and will be helpful for the development of pest management strategies.

关键词： antennal transcriptome codlemone acetate Cydia pomonella',pheromone receptor

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Cloning and expression of putative ethylene receptor genes in soybean plant

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Progress in Natural Science:Materials International 2007年第10期17卷 1152-1160页

作者： Xie Zongming1,2,3, Lei Gang1,2, Wuriyanghan Hada1,2, Tian Aiguo1, Zhang Jinsong1 and Chen Shouyi1(1. National Key Laboratory of Plant Genomics, institute of Genetics and Developmental Biology, Chinese academy of sciences, Beijing 100101, China 2. Graduate School of Chinese academy of sciences, Beijing 100039, China 3. xinjiang academy of agricultural and reclamation Science, Shihezi 832000, China) National Key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China Graduate School of Chinese academy of sciences Beijing 100039 China xinjiang academy of agricultural and reclamation Science Shihezi 832000 China

Ethylene plays important roles in plant growth, development, and stress responses, and ethylene receptors have been identified and studied extensively in various plant species. Here we report the cloning of four ethylene receptor genes from soybean, i.e. GmETR1, GmERS1, GmETR2 and GmEIN4. Construction of the phylogenic tree showed that GmETR1 and GmERS1 belong to subfamily I whereas GmETR2 and GmEIN4 belong to subfamily II. The four ethylene receptor genes showed different tissue-specific expression patterns in roots, stems, leaves, cotyledons, flowers, pods and seeds of soybean. These genes were differentially regulated by various abiotic stresses and plant hormones. The possible roles of the four genes in soybean plant were also discussed.

关键词： abiotic stress expression analysis ethylene receptor plant hormone soybean.

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Historical evolution and the effects of ecological management in Tarim Basin, China

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Chinese Science Bulletin 2010年第36期55卷 4097-4103页

作者： ZHUANG Li DONG YunShe YIN FeiHu CHEN YaNing institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Biology Shihezi University Shihezi 830002 China xinjiang academy of agricultural and reclamation Science Shihezi 830002 China xinjiang institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

The Tarim Basin, in northwestern China, is the largest continental basin in the world, and hosts desert landscapes as well as extensive oasis agriculture. Many horticultural products come from this basin. However, since the 1950s, frequent river flow interruptions have occurred in the lower reaches of the Tarim River. Thus, the natural ecology of the basin has undergone significant changes because of recent human economic and social activities. In particular, water resource development and utilization along with climate changes have had a significant impact on the area. To prevent further deterioration of the environment, the Central Government implemented a water conveyance project in 2000. Based on this project, Chinese scientists, together with those from overseas, have conducted extensive research on the historical evolution of the area, and the physiological and ecological responses of the natural vegetation around the Tarim Desert Highway. Progress has been made in the areas of environmental protection and ecological conservation.

关键词：塔里木盆地中国西北部历史演变生态管理塔里木沙漠公路水资源开发塔里木河下游生理生态响应

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Land surface temperature retrieval for arid regions based on Landsat-8 TIRS data:a case study in Shihezi,Northwest China

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Journal of Arid Land 2014年第6期6卷 704-716页

作者： Lei YANG YunGang CAO XiaoHua ZHU ShengHe ZENG GuoJiang YANG JiangYong HE XiuChun YANG Department of Remote Sensing and Geographic Information Engineering Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong University institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences institute of Farmland Water Conservancy and Soil-fertilizer Xinjiang Academy of Agricultural and Reclamation Science institute of agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences College of Environment and Planning Shangqiu Normal University

Scientific interest in geophysical information about land surface temperature （LST） is ever increasing, as such information provides a base for a large number of applications, including environmental and agricultural monitoring. Therefore, the research of LST retrieval has become a hot topic. Recent availability of Landsat-8 satel- lite imagery provides a new data source for LST retrieval. Hence, exploring an adaptive method with reliable ac- curacy seems to be essential. In this study, basing on features of Landsat-8 TIRS thermal infrared channels, we re-calculated parameters in the atmospheric transmittance empirical models of the existing split-window algorithm, and estimated the ground emissivity with the help of the land cover classification map of the study area. Further- more, a split-window algorithm was rebuilt by virtual of the estimation model of the updated atmospheric transmit- tance and the ground emissivity, and then a remote sensing retrieval for the LST of Shihezi city in xinjiang Uygur autonomous region of Northwest China was conducted on the basis of this modified algorithm. Finally, precision validation of the new model was implemented by using the MODIS LST products. The results showed that the LST retrieval from Landsat-8 TIRS data based on our algorithm has a higher credibility, and the retrieved LST is more consistent with the MODIS LST products. This indicated that the modified algorithm is suitable for retrieving LST with competitive accuracy. With higher resolutions, Landsat-8 TIRS data may provide more accurate observation for LST retrieval.

关键词： thermal infrared remote sensing land surface temperature retrieval split-window algorithm Landsat-8 TIRS

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Language Model Score Regularization for Speech Recognition

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Chinese Journal of Electronics 2019年第3期28卷 604-609页

作者： ZHANG Yike ZHANG Pengyuan YAN Yonghong institute of Acoustics Chinese Academy of Sciences University of Chinese academy of sciences xinjiang Technical institute of Physics and Chemistry Chinese Academy of Sciences

Inspired by the fact that back-off and interpolated smoothing algorithms have significant effect on statistical language modeling, this paper proposes a sentence-level Language model(LM) score regularization algorithm to improve the fault-tolerance of LMs for recognition errors. The proposed algorithm is applicable to both count-based LMs and neural network LMs. Instead of predicting the occurrence of a sequence of words under a fixed order Markov assumption, we use a composite model consisting of different order models with either n-gram or skip-gram features to estimate the probability of the sequence of words. In order to simplify implementations,we derive a connection between bidirectional neural networks and the proposed algorithm. Experiments were carried out on the Switchboard corpus. Results on N-best lists re-scoring show that the proposed algorithm achieves consistent word error rate reduction when it is applied to count-based LMs, Feedforward neural network(FNN)LMs, and Recurrent neural network(RNN) LMs.

关键词： Speech recognition Language model score regularization Interpolation Bidirectional neural network

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Experiment and optimal design of a collection device for a residual plastic film baler

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Frontiers of agricultural Science and Engineering 2015年第4期2卷 347-354页

作者： Qi NIU Xuegeng CHEN Chao JI Jie WU College of Engineering China Agricultural UniversityBeijing 100083China machinery and equipment Research institute Xinjiang Academy of Agriculture and Reclamation SciencesShihezi 832000China College of Mechanical and Electrical Engineering Shihezi UniversityShihezi 832002China

It is imperative to carry out research on residual plastic film collection technology to solve the serious problem of farmland *** residual plastic film baler was designed as a package for film strip collection,cleaning and *** collection device is a core component of the *** surface analysis was used in this study to optimize the structure and working parameters for improving the collection efficiency of residual film and the impurity of film *** results show that the factors affecting the collection rate of residual film and the impurity of the film package are the speed ratio(k)between the trash removal roller and eccentric collection mechanism,the number(z)and the mounting angle(θ)of spring teeth in the same revolution *** the collection rate,the importance of the three factors are in the order,k>z>θ.Meanwhile,for the impurity,the importance of three factors are in the order,z>k>θ.When the speed ratio,the mounting angle and the number of spring teeth was set at 1.6°,45°,and 8°,respectively,the collection rate of residual film was 88.9%and the impurity of residual film package was 14.2%for the baler.

关键词： residual film collection device collection rate of residual film impurity of film package optimization baler

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