棉 花 学 报    Cotton Science  2007，19(6)：446-449

 

Study on the Physiological Characteristic of Cotton Root in the Composite Root Population of Wheat  cotton Double Cropping System in Symbiotic Period
WANG Ying1，WANG Li-guo1，CHEN Bing-lin1，ZHOU Zhi-guo1*，ZHANG Li-zhen1，2，ZHANG Si-ping2
（1.Key Laboratory of Crop Growth Regulation of the Ministry of Agriculture，Nanjing Agriculture University ，Nanjing  210095；2.Cotton Research Institute of CAAS，Anyan 455000，China）

Abstract：According to the single-planting cotton as CK，the effect of the different composite root population of wheat-cotton double cropping system on cotton root growth was studied by setting three treatments，i.e. wheat-cotton double cropping system in which the roots of wheat and cotton mixed naturally(WCRM)，wheat-cotton double cropping system in which the roots of wheat and cotton separated with nylon net (WCRN)，and wheat-cotton double cropping system in which the roots of wheat and cotton separated with plastic film(WCRP). The results showed that：in the symbiotic period of wheat and cotton，the cotton root activity reduced in WCRM and WCRN，and increased in WCRP. The activity of SOD，POD，CAT and soluble protein content of cotton root reduced under the system of separated or united roots of wheat and cotton ，improved after wheat harvested in various degrees in the symbiotic period，but the activity and soluble protein in WCRP were lower than those in WCRM.
Key Words：wheat-cotton double cropping；symbiotic period；cotton root；physiological characteristic
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