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Screenning for Higher Nutrients Use Efficiency of Sugarcane Germplasm

Author: LiWenBao
Tutor: LiFuSheng
School: Guangxi University
Course: Plant Nutrition
Keywords: Sugarcane germplasm resources Agronomic traits Resistance , low nutrient index Biomass Photosynthetic characteristics
CLC: S566.1
Type: Master's thesis
Year: 2011
Downloads: 14
Quote: 0
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Abstract


Sugar cane is one of the country 's major cash crops , nutrient deficiency a great impact on the yield and quality . For screening sugarcane nutrient efficient use of varieties , Based on the 98 sugarcane varieties pot experiment , cluster analysis on the basis of the table of the main agronomic traits shaped value weighted average method , the resistance of aboveground biomass low nutrient index screening sugarcane nutrient efficient , effective and inefficient use of varieties . And some varieties of nutrient stress on photosynthetic characteristics analysis , to explore the feasibility of screening indicators of nutrient efficient varieties photosynthetic characteristics parameters as in the early growth of sugar cane . The main findings are as follows : 1 . Nitrogen efficient varieties Guitang 02/ 239 , PR1059 , Guangdong, 71/ 210, of ROC22 9 nitrogen inefficient varieties BADILA, Hengxian chewing cane , Los ancient cane 13 ; phosphorus efficient Guitang 02/ 239 varieties , PR1059 , the Cantonese 71/ 210 , spontaneum 94 6 and 13 BADILA, ROC16, JA64/11 phosphorus inefficient varieties ; potassium efficient varieties PR1059 , the Cantonese 71 / 210 Guangdong 71/ 210 , spontaneum 94 11 potassium inefficient Hengxian chewing cane varieties , BADILA , Gui sugar , 04 / 2423 , etc. 13 . 3 breeding sub- efficient Total breed is Guitang 02/ 239 , the PR1059 , Guangdong, 71 / 210 , 3 breeding sub inefficient Total varieties BADILA, Hengxian chewing cane , Los ancient cane , Guitang 60 / 289 , Lu cane Q124 , POJ2725 A64/11 low - nitrogen , phosphorus or potassium nutrition suppression sugarcane growth and development , reduce plant height , stem diameter , leaf length , leaf area , root to shoot ratio , belowground biomass and aboveground biomass . Compared with nutrient - inefficient varieties , nutrient efficient varieties fell less , seven major agronomic traits differences between the different varieties , but the biggest difference in aboveground biomass . Under low nutrient conditions , nutrient screening according to the changes of the photosynthetic characteristics nutrient efficient varieties and inefficient cultivar land upper biomass resistant to low nutrient index screening efficient and inefficient cultivar . As compared with nitrogen inefficient varieties , nitrogen efficient varieties with high photosynthetic rate and intercellular CO2 concentration , can be considered both as a reference index of the early growth of sugar cane varieties screening of low nitrogen tolerance .

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CLC: > Agricultural Sciences > Crop > Economic crops > Sugar crop > Cane
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