ABSTRACT
Effects of ridge tillage on photosynthesis and root characters of rice

Yao Yuan-zhi1*
 
Rice (Oryza sativa L.) is an important crop and breeding has not been able to improve yield. Root characteristics of hybrid rice ‘Zhuliangyou 02’ under conventional tillage and ridge tillage were studied in a Calcisols in Huaihua, China, from 2011 to 2013 to find better tillage methods to resolve massive water consumption, improve yield, and enhance productivity of agricultural labor for rice cultivation. Results showed ridge tillage increased photosynthetic parameters such as photosynthetic rate (PN), stomatal conductance (gs), and water use efficiency (WUE). It also significantly enhanced rice root number, root activity, and antioxidant enzyme activities; it also increased effective panicle number and actual yield by 22.12% and 15.18%, respectively, and enhanced aerenchymae during the early growth stage. Overall, ridge tillage could promote hybrid rice yields by enhancing root absorption, gas exchange, and reducing water consumption. It could be widely used in rice cultivation.
Keywords: Oryza sativa, photosynthesis, tillage method, yield.
1Huaihua University, Department of Life Sciences, Huaihua, Hunan, 418008, P.R. China. *Corresponding author (yaoyz1234@126.com).