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Effects of Plant Community Type on Soil Methane Flux in Semiarid Loess Hilly Region,Central gansu Province,China

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Advances in Atmospheric sciences 2022年第8期39卷 1360-1374页

作者： Chuanjie YANG Guang LI Lijuan YAN Weiwei MA Jiangqi WU Yan TAN Shuainan LIU Shikang ZHANG college of Forestry Gansu Agricultural UniversityLanzhou 730070China gansu provincial key laboratory of aridland crop science Lanzhou 730070China college of agronomy Gansu Agricultural UniversityLanzhou 730070China

Methane(CH_(4))is an important greenhouse gas second only to CO_(2)in terms of its greenhouse *** plays an important role in controlling soil CH_(4)fluxes,but the spatial variability of soil CH_(4)fluxes during vegetation restoration in Loess Hilly Region(LHR)is not fully *** effects of different plant community types[Medicago sativa grassland(MS);Xanthoceras sorbifolium forestland(XS);Caragana korshinskii bushland(CK);Hippophae rhamnoides shrubland(HR);and Stipa bungeana grassland(SB)]on soil CH_(4)flux in LHR were studied via the static chamber *** results showed that the five plant community types were sinks of soil CH_(4)in LHR,the plant community type significantly affected the soil CH_(4)flux,and the average CH_(4)uptake from high to low was in SB,HR,CK,MS,and *** the whole study period,the soil CH_(4)flux showed similar interannual *** maximum absorption of soil CH_(4)appeared in the growing season,while the minimum appeared in *** CH_(4)uptake was positively correlated with soil temperature and soil *** temperature and moisture are important controlling factors for the temporal variability of soil CH_(4)*** LHR,the Stipa bungeana grassland is the more suitable plant community type for reducing soil CH_(4)*** the process of vegetation restoration in LHR,the soil CH_(4)absorption potential of different plant community types should be considered,ecological benefits should be taken into account,and vegetation more suitable for mitigating the greenhouse effect should be selected.

关键词： plant community type methane temporal variation Loess Hilly Region

Initial exploration of the mechanism underlying H2O2-induced root horizontal bending in pea

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science Bulletin 2015年第14期60卷 1298-1300页

作者： Sheng Li Li-Rong Su Shao-Ying Ma Zhen-Zhen Shi Xiao-Ming Yang gansu provincial key laboratory of aridland crop science College of Life Science and Technology Gansu Agricultural University Institute of crop Gansu Academy of Agricultural Sciences

It was reported that exogenous hydrogen peroxide （H2O2） can induce primary root bend in Arabidopsis and pea. However, the mechanism remains unclear. Here we explored the mechanism underlying this phenomenon by using the pea （Pisum sativum L.） variety ＂longwan No. 1＂ The results showed that the endogenous indole-3-acetic acid （IAA） content decreased and gibberellin A3 （GA3） content increased in the curving primary pea root induced by H2O2. Meanwhile, both of the two hormones asymmetrically distributed in the inside and outside parts of the curving root. Also, the starch content decreased due to the increased a-amylase activity in this process. However, exogenous Ca2＋ can relieve the horizontal bending of pea root induced by H2O2 and altered the contents of endogenous IAA and GA3. A working model was proposed： Exogenous H2O2 causes the increase in GA3 content, and GA3 stimulates the activity of or-amylase, which leads to the hydrolysis of starch, and then the root lost the gravity perceiving. The asymmetric distribution of IAA and GA3 in two sides of curving root may cause the horizontal *** Ca^2＋ can relieve root bending through altering the endogenous IAA and GA3 contents.

关键词： Gravitropism Exogenous H2O2Horizontal bending Primary pea root

Varied previous crops on improving oilseed flax productivity in semiarid Loess Plateau in China

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Oil crop science 2020年第4期5卷 187-193页

作者： Bangqing Zhao Yuhong Gao Bin Yan Zhengjun Cui Haidi Wang Zhi Cao gansu provincial key laboratory of aridland crop science Gansu Agricultural UniversityLanzhouChina college of agronomy Gansu Agricultural UniversityLanzhouChina

To investigate the effects of crop rotation on oilseed flax growth and yield,three season experiments were carried out in semi-arid area of Dingxi,gansu from 2017 to *** designed 6 rotational systems were FFF(flax-flaxflax),PFF(potato-flax-flax),WPF(wheat-potato-flax),FPF(flax-potato-flax),PWF(potato-wheat-flax)and FWF(flax-wheat-flax).Flax growth and yield investigation results showed that crop rotation increased leaf area duration,dry matter accumulation,seed nitrogen accumulation,water and nitrogen used efficiency,compared with continuous cropping of *** yields in rotation systems were 22.23%–44.11%greater than those of continuous cropping *** in wheat and potato stubbles had higher tiller number(21.43%and 29.46%),more branches(14.24%and 6.97%),effective capsules(26.35%and 28.79%),higher water use efficiency(40.26%and 33.5%),higher nitrogen partial factor productivity(33.85%and 31.46%)and dry matter(41.98%and 25.47%)than those in oilseed flax *** concluded that crop rotation system was an effective measure for oilseed flax productivity in semi-arid area by improving yield components and promoting biomass.

关键词： crop rotation Linseed Grain yield Water use efficiency Nitrogen partial factor productivity

Effects of Different Tillage Systems on Soil Properties,Root Growth,Grain Yield,and Water Use Efficiency of Winter Wheat (Triticum aestivum L.) in Arid Northwest China

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Journal of Integrative Agriculture 2012年第8期11卷 1286-1296页

作者： HUANG Gao-bao CHAI Qiang FENG Fu-xue YU Ai-zhong gansu provincial key laboratory of aridland crop science/Faculty of agronomy Gansu Agricultural University Lanzhou 730070 P.R. China college of Engineering Gansu Agricultural University Lanzhou 730070 P.R.China

Studies on root development, soil physical properties, grain yield, and water-use efficiency are important for identifying suitable soil management practices for sustainable crop production. A field experiment was conducted from 2006 through 2008 in arid northwestern China to determine the effects of four tillage systems on soil properties, root development, water-use efficiency, and grain yield of winter wheat （Triticum aestivum L.）. The cultivar Fan 13 was grown under four tillage systems：conventional tillage （CT） without wheat stubble, no-tillage without wheat stubble mulching （NT）, no-tillage with wheat stubble standing （NTSS）, and no-tillage with wheat stubble mulching （NTS）. The soil bulk density （BD） under CT system increased gradually from sowing to harvest, but that in NT, NTSS, and NTS systems had little change. Compared to the CT system, the NTSS and NTS systems improved total soil water storage （0-150 cm） by 6.1-9.6 and 10.5- 15.3% before sowing, and by 2.2-8.9 and 13.0-15.1% after harvest, respectively. The NTSS and NTS systems also increased mean dry root weight density （DRWD） as compared to CT system. The NTS system significantly improved water-use efficiency by 17.2-17.5% and crop yield by 15.6-16.8%, and the NTSS system improved that by 7.8-9.6 and 7.0-12.8%, respectively, compared with the CT system. Our results suggested that Chinese farmers should consider adopting conservation tillage practices in arid northwestern China because of benefits to soil bulk density, water storage, root system, and winter wheat yield.

关键词： conservation tillage soil water storage bulk density water use efficiency winter wheat (Triticum aestivumL.) root system grain yield

Straw strip mulching in a semiarid rainfed agroecosystem achieves winter wheat yields similar to those of full plastic mulching by optimizing the soil hydrothermal regime

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The crop Journal 2022年第3期10卷 879-892页

作者： Yuwei Chai Qiang Chai Rui Li Yawei Li Changgang Yang Hongbo Cheng Lei Chang Shouxi Chai State key laboratory of aridland crop science Gansu Agricultural UniversityLanzhou 730070GansuChina college of agronomy Gansu Agricultural UniversityLanzhou 730070GansuChina college of Bioscience and Technology Gansu Agricultural UniversityLanzhou 730070GansuChina

Straw strip mulching(SM)is a new mulching *** 2012 to 2018,SM’s effects on soil moisture and temperature and production performances were compared with other mulching practices,using three treatments:full-cover plastic mulch(PM),no mulch with wheat sown in rows as the control(CK),and SM with 50%to 59%of the field area *** with CK,on average over six growing seasons,SM and PM increased grain yield by 27.0%and 21.7%,straw yield by 21.6%and 22.6%,kernels ha;by 26.6%and 19.0%,net income by 29.8%and-25.0%,soil temperature at 5 cm by-1.5°C and 0.2°C from overwintering to maturity,and soil water storage at 0–200 cm by 25 and 22 mm,*** increase in soil moisture in SM and PM was greater in the early period(overwintering to jointing)than in the later period(booting to maturity)and at 0 to 120 cm than at 120–200 cm in the early *** the mean evapotranspiration of whole growth period across six seasons was similar among treatments,SM and PM increased water consumption during the key formation period of yield components after overwintering by 16 and 32 mm,respectively,while reducing it before *** with CK,SM and PM had the effects of warming during overwintering and cooling after *** increasing water consumption after overwintering and ratio of transpiration to evapotranspiration and providing favorable soil temperature for multiple growth stages and more sufficient soil moisture,SM and PM promoted vegetative growth and increased kernels ha^(-1),the main mechanisms by which SM and PM increased grain yield relative to *** to PM,SM is a more economically beneficial and environment-friendly technology for dryland wheat production.

关键词： Mulch pattern Yield formation Vegetative growth Water use efficiency Hydrothermal interaction

Numerical simulation and analysis of mechanized suppression process of seedbed with whole plastic film mulching on double ridges

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International Journal of Agricultural and Biological Engineering 2021年第1期14卷 142-150页

作者： Fei Dai Xuefeng Song Wuyun Zhao Bugong Sun Ruijie Shi Yang Zhang college of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China gansu provincial key laboratory of aridland crop science Gansu Agricultural UniversityLanzhou 730070China

In order to achieve the construction standard of high mechanized performance of the seedbed with whole plastic-film mulching on double ridges,in this study,the forms of suppression failure were analyzed,and the key factors influencing the suppression performance were determined based on the structure of the seedbed suppression device and its working *** discrete element method was adopted for numerical simulation on the suppression process of the seedbed with whole plastic film mulching on double ridges;the parameters during the interaction between the suppression device and seedbed soil were extracted and analyzed,such as contact area,sinkage and horizontal traction resistance trend of press wheels on big ridges and furrows of small *** the suppression load on big ridges,suppression load on furrows of small ridge,and advancing velocity of the combined operation machine as the independent variables,qualified rate of suppression as the response value,a mathematical model between the test factors and qualified rate of suppression was established,to explore the influence sequence of the factors on suppression qualified *** optimal working parameters of the suppression device were finally obtained:the suppression load on big ridges was 40 N,suppression load on furrows of small ridge was 69.8 N and the machine advancing velocity was 0.98 m/s,and the achieved mean value of suppression qualified rate was 92.6%.Field verification test showed that the mean value of suppression qualified rate was 90.3%,a mere difference of 2.3%compared with the simulation *** actual operation of the sample machine was basically consistent with the simulation process and could reveal the mechanized suppression operation mechanism of the seedbed with whole plastic film mulching on double ridges,indicating that the established DEM model and its parameter setting were relatively accurate and reasonable.

关键词： seedbed whole plastic film mulching double ridges mechanized suppression discrete element method numerical simulation parameter optimization

Genome-wide identification and expression analysis of StPP2C gene family in response to multiple stresses in potato (Solanum tuberosum L.)

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Journal of Integrative Agriculture 2020年第6期19卷 1609-1624页

作者： WANG Yi-fan LIAO Yu-qiu WANG Ya-peng YANG Jiang-wei ZHANG Ning SI Huai-jun college of Life science and Technology Gansu Agricultural UniversityLanzhou 730070P.R.China gansu provincial key laboratory of aridland crop science Gansu Agricultural UniversityLanzhou 730070P.R.China college of agronomy Gansu Agricultural UniversityLanzhou 730070P.R.China

The plant protein phosphatase 2Cs(PP2Cs)play an essential role in response to stress and abscisic acid(ABA)signaling ***,to date,no systemic characterization of the PP2Cs has yet bee n con ducted in potato(Solan um tuberosum L.).In the study,a comprehensive research was performed on genome-wide identification and expression analysis of StPP2C genes in potato.A total of 78 potato StPP2C genes were identified based on specific structure of PP2C domain,which were distributed across 11 out of 12 potato chromosomes and divided into 12(A-L)phylogenetic *** result from gene duplication an alysis showed that 14 StPP2Cs were in volved in gene tan dem duplication and 8 genes formed fragment duplicati on eve nts,which indicated that both tandem and fragment duplicati on contributed to the expa nsion of the gene family in ***-intron structural analysis showed that they had a wide range of exon *** of protei n con servative motif dem on strated that StPP2Cs contained more similar motif structures in the same phyloge netic *** c/s-elements in StPP2C gene promoter regions were mainly responded to light,phytohormone and abiotic *** of them exhibited tissue-specific expressi on patter ns,and some members could differe ntially express un der abiotic *** evidenee suggested that StPP2C genes may contribute to different functions in several physiological stress and environmental stress conditi *** study could provide new in sights to further in vestigate StPP2C functional characteristics responding to various stresses in potato.

关键词： protein phosphatase 2C expression pattern stress ABA potato

Mechanism analysis and performance improvement of mechanized ridge forming of whole plastic film mulched double ridges

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International Journal of Agricultural and Biological Engineering 2020年第5期13卷 107-116页

作者： Fei Dai Xuefeng Song Wuyun Zhao Ruijie Shi Fengwei Zhang Xuekun Zhang gansu provincial key laboratory of aridland crop science Gansu Agricultural UniversityLanzhou 730070China college of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China

In order to achieve high-performance and mechanization construction standard of whole plastic mulched double ridge seedbed,and to meet its forming process and corresponding agronomic requirements of the mechanized double ridge seedbed,the key working parameters such as the speed of rotary blade group,the thickness of upturned sod and the power consumption of rotary blade group under different parameters were analyzed based on related working performance in ridge ***,the test factors and their range of values were finally determined in this *** element method(DEM)simulation was applied in the numerical simulation of the mechanized ridge forming process of whole plastic mulched double ridges,and the ridge forming effect and digging resistance variation characteristics of different types of shovels were *** the forward speed of the combined machine,the penetration angle of the arc-shaped shovel and the depth of rotary tillage as independent variables,and the qualified rate of seedbed tillage as the response value,the mathematical model between the test factors and the qualified rate of the seedbed tillage was established,to explore the influence sequence of the factors on the qualified rate of seedbed tillage,and obtained the following optimal working parameters of the ridge forming device:the advancing velocity of the combined machine of 0.50 m/s,penetration angle of the arc-shaped shovel of 31°,rotary tillage depth of 140 mm,and average qualified rate 95.20%of seedbed tillage in corresponding simulation verification *** test showed that the average qualified rate of seedbed tillage in ridge forming device was 93.60%,which was close to that of the simulation *** actual working condition of the sample machine was basically in line with the simulation process and could relatively precisely reflect the mechanized ridge forming mechanism of whole plastic double *** results showed that the established DEM model and its

关键词： whole plastic film mulched double ridges mechanized ridge forming DEM numerical simulation parameter optimization

TabHLH95-TaNF-YB1 module promotes grain starch synthesis in bread wheat

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Journal of Genetics and Genomics 2023年第11期50卷 883-894页

作者： Yunchuan Liu Wei Xi Xiaolu Wang Huifang Li Hongxia Liu Tian Li Jian Hou Xu Liu Chenyang Hao Xueyong Zhang key laboratory of crop Gene Resources and Germplasm Enhancement Ministry of Agriculture and Rural Affairs/The National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State key laboratory of aridland crop science(gansu Agricultural University)/gansu provincial key laboratory of crop Improvement&Germplasm Enhancement LanzhouGansu 730070China college of agronomy Gansu Agricultural UniversityLanzhouGansu 730070China

Starch is the most abundant substance in wheat(Triticum aestivum L.)endosperm and provides the major carbohydrate energy for human daily *** synthesis-related(SSR)genes are believed to be spatiotemporally specific,but their transcriptional regulation remains unclear in ***,we investigate the role of the basic helix-loop-helix(bHLH)transcription factor TabHLH95 in starch ***95 is preferentially expressed in the developing grains in wheat and encodes a nucleus localized protein without autoactivation *** Tabhlh95 knockout mutants display smaller grain size and less starch content than wild type,whereas overexpression of TabHLH95 enhances starch accumulation and significantly improves thousand grain *** analysis reveals that the expression of multiple SSR genes is significantly reduced in the Tabhlh95 ***95 binds to the promoters of ADP-glucose pyrophosphorylase large subunit 1(AGPL1-1D/-1B),AGPL2-5D,and isoamylase(ISA1-7D)and enhances their ***,TabHLH95 interacts with the nuclear factor Y(NF-Y)family transcription factor TaNF-YB1,thereby synergistically regulating starch *** results suggest that the TabHLH95-TaNF-YB1 complex positively modulates starch synthesis and grain weight by regulating the expression of a subset of SSR genes,thus providing a good potential approach for genetic improvement of grain productivity in wheat.

关键词： Starch synthesis TabHLH95-TaNF-YB1 module Synergistic regulation Grain weight Wheat