[Objective]The aim was to study on characteristics of retoon rice yield components,and relationship of the characteristics with born bud rate and root ac-tivity of retoon rice before harvesting.[Method]Eighteen mid-se...[Objective]The aim was to study on characteristics of retoon rice yield components,and relationship of the characteristics with born bud rate and root ac-tivity of retoon rice before harvesting.[Method]Eighteen mid-season hybrid rice va-rieties approved recently were taken as materials in high-yield cultivation conditions.Characteristics of retoon rice yield components were analyzed,and relationship of yield components characteristics with the rate of bud emergence and root activity of retoon rice before harvesting was explored,based on related data.[Result]Highly-yielding retoon rice is characterized by high effective ear number(Xl)and high set-ting percentage(X4);the number of germinated shoots the 5^*d after first-batch rice was cut is a key factor for retoon rice yield and was of positive correlation with re-toon rice seedlings and effective ears,with correlation coefficients at 0.80^**and 0.76^**.In addition,bleeding sap was of positive correlation with grain number and setting percentage of retoon rice and correlation coefficients were 0.50^*and 0.48^**,and of positive correlation with average panicle weight,with correlation coefficient at 0.63.[Conclusion]It is an effective way for the rate of bud emergence and root activity at lar ecological zones.mproving retoon rice yield to increase harvesting in the test sites and simi lar ecological zones.展开更多
Objective] The alm was to expIore northward movement and highIy-quali-fied cuItivation technoIogy of super-earIy maturing ratoon rice. [Method] The 2nd-sea-son rice was cuItivated in the test with suitabIe temperature...Objective] The alm was to expIore northward movement and highIy-quali-fied cuItivation technoIogy of super-earIy maturing ratoon rice. [Method] The 2nd-sea-son rice was cuItivated in the test with suitabIe temperature, heat water and fertiIiz-er, on basis of stubbIes of the 1st-season rice. Hence, rice can be harvested twice per year, with short growth periods, and high yields, and the cuItivation is simpIe to be operated, avoiding the peak of disease damages, so that pesticides are not re-quired. [Result] The experiment of northward movement of super-earIy rice achieved success in Shenyang on October 9, 2014, with super-earIy maturing japonica rice 8501. [Conclusion] Northward movement of ratoon rice enjoys a promising prospect in increasing crop yield and guaranteeing food security.展开更多
文摘[Objective]The aim was to study on characteristics of retoon rice yield components,and relationship of the characteristics with born bud rate and root ac-tivity of retoon rice before harvesting.[Method]Eighteen mid-season hybrid rice va-rieties approved recently were taken as materials in high-yield cultivation conditions.Characteristics of retoon rice yield components were analyzed,and relationship of yield components characteristics with the rate of bud emergence and root activity of retoon rice before harvesting was explored,based on related data.[Result]Highly-yielding retoon rice is characterized by high effective ear number(Xl)and high set-ting percentage(X4);the number of germinated shoots the 5^*d after first-batch rice was cut is a key factor for retoon rice yield and was of positive correlation with re-toon rice seedlings and effective ears,with correlation coefficients at 0.80^**and 0.76^**.In addition,bleeding sap was of positive correlation with grain number and setting percentage of retoon rice and correlation coefficients were 0.50^*and 0.48^**,and of positive correlation with average panicle weight,with correlation coefficient at 0.63.[Conclusion]It is an effective way for the rate of bud emergence and root activity at lar ecological zones.mproving retoon rice yield to increase harvesting in the test sites and simi lar ecological zones.
基金Supported by Special Fund for Agro-scientific Research in the Public Interest~~
文摘Objective] The alm was to expIore northward movement and highIy-quali-fied cuItivation technoIogy of super-earIy maturing ratoon rice. [Method] The 2nd-sea-son rice was cuItivated in the test with suitabIe temperature, heat water and fertiIiz-er, on basis of stubbIes of the 1st-season rice. Hence, rice can be harvested twice per year, with short growth periods, and high yields, and the cuItivation is simpIe to be operated, avoiding the peak of disease damages, so that pesticides are not re-quired. [Result] The experiment of northward movement of super-earIy rice achieved success in Shenyang on October 9, 2014, with super-earIy maturing japonica rice 8501. [Conclusion] Northward movement of ratoon rice enjoys a promising prospect in increasing crop yield and guaranteeing food security.
