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Experiment Research on Control Methods of Germination of Puccinelia Tenuiflora is Seeds

Author: RenXiaoQing
Tutor: JiHong
School: Lanzhou University of Technology
Course: Mechanical and Electronic Engineering
Keywords: Desertification Saline water irrigation Saline soil Germination rate Germination rate
CLC: S543.9
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 0
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Abstract


The land desertification plagued human survival and development , the formation of land salinization and lack of irrigation with freshwater resources , exacerbate the desertification of land two important reasons . Desertification governance, we must first try to restore the local vegetation , restore vegetation or with salt water irrigated vegetation , select the salt tolerance of salt-tolerant plants and research both in saline soil . Solve the vegetation restoration work . Alkali thatched seed (Puccinelia tenuiflora) with different types of salt (NaCl and Na2CO3) analog salted and salt water , study the physical treatment of different temperatures on the alkali the thatched seed germination rate , average germination time ; find effective method to break seed dormancy ; different concentrations of CaCl2 solution to alleviate the effects of salt stress and seed depth of the depth of their germination . The main findings are as follows : ( 1 ) low temperature 3-5 ° C , processing alkali thatched seed 9d, get rid of the effect of seed dormancy best germination rate can reach 88% . ( 2 ) the low concentration of salt solution on the the alkali the thatched seed germination rate did not have much impact, but there is a certain role in the promotion of germination . When NaCl farmers more than 2.5% , Na2CO3 concentration exceeds 3.0% , the germination performance significantly inhibit the inhibitory effect is increasing as the concentration constantly enhance germination time required to continue to extend the 5% NaCl concentration . Na2CO3 agriculture of 5.5% , two kinds of salt stress on germination rate is zero. ( 3 ) of Na2CO3 stress mitigation concentration of the best the CaCl2 Yung liquid 3% , the germination rate increased to 26 % , NaCl stress , the best mitigation CaCl2 solution concentration of 2.5% , the germination rate to 17%. ( 4 ) the impact of the depth of the depth of the emergence of the depth of seed burial depth 0.5cm, best germination rate , the 12th day of emergence , the germination rate of 9% , 27 days up to a maximum of 73% germination rate , the entire seedling stage for 15 days. The depth increases 3cm when germination rate to 0 . Alkali thatched seed the alkali the thatched seed germination characteristics of the physiological observations in different types of salt stress changes , its salt tolerance of its basic data effectively improve saline land and saline water irrigation to provide a basis for the northwest salinized soil improvement and governance .

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CLC: > Agricultural Sciences > Crop > Fodder crops,pasture > Perennial grass forages > Other
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