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A long-term field experiment(started at 2003)was conducted to determine the effects of different rice cultivation methods on growth characteristics and grain yield of late-season rice under double-rice cropping system in seasonal drought region of southeast China(Yujiang County,Jiangxi Province).The rice cultivation methods included no-tillage and flooded rice cultivation(N-F),no-tillage and non-flooded rice cultivation with straw mulching(N-SM),and no-tillage and non-flooded rice cultivation without straw mulching(N-ZM).There was no significant difference in rice grain yield between the N-SM and N-F treatments.However,the rice grain yields in the N-SM and N-F treatments were significantly higher than that in the N-ZM treatment.The late-season rice plants in the N-SM treatment had significantly higher numbers of effective panicles and total grains per hill compared with those in the N-ZM treatment.The above-ground dry matter of late-season rice was similar between the N-SM and N-F treatments.Compared with the N-F treatment,the N-ZM and N-SM treatments significantly decreased the leaf area at the heading stage.Moreover,the N-SM treatment could significantly increase total root length and root tip number at the grain-filling stage compared with the N-ZM treatment.
A long-term field experiment (started at 2003) was conducted to determine the effects of different rice cultivation methods on growth characteristics and grain yield of late-season rice under double-rice cropping system in seasonal drought region of southeast China (Yujiang County, Jiangxi Province). The rice cultivation methods included no-tillage and flooded rice cultivation (NF), no-tillage and non-flooded rice cultivation with straw mulching (N-SM), and no-tillage and non-flooded rice cultivation without straw There was no significant difference in rice grain yield between the N-SM and NF treatments. However, the rice grain yields in the N-SM and NF treatments were significantly higher than that in the N-ZM treatment The late-season rice plants in the N-SM treatment had significantly higher numbers of effective panicles and total grains per hill compared with those in the N-ZM treatment. The above-ground dry matter of late-season rice was similar between the N-SM and NF trea Treated with the NF treatment, the N-ZM and N-SM treatments significantly decreased the leaf area at the heading stage. Moreover, the N-SM treatment could significantly increased total root length and root tip number at the grain-filling stage compared with the N-ZM treatment.