3)The methodology of regional trials A Selection of the locations: representative locations B. The Check(reference) variety C Experimental design: Randomized complete block design D Statistics(Yield increase %; Stability and Stability indices) 2. Production trial Production trial. i.e. Farmer land trial 9. arge plot comparison(totally over I mu/variety); 1-2
(3) The methodology of regional trials A. Selection of the locations: representative locations B. The Check (reference) variety C. Experimental design: Randomized complete block design D. Statistics (Yield increase %; Stability and Stability indices) 2. Production Trial Production trial, i.e. Farmer land trial Large plot comparison (totally over 1 mu/variety); 1-2 rep’s
3. Cultivation trial Cultivation trial (Experiment for cultivation techniques) Multiple factors considered planting date planting desity fertilizer application(N, P,K and others) other technical factors Experimental designs Multi-factor designs(Randomized complete block design, split-block design, latin square design,...) Replications=3 or more
• Cultivation trial (Experiment for cultivation techniques) Multiple factors considered: planting date planting desity fertilizer application (N, P, K and others) other technical factors • Experimental designs Multi-factor designs (Randomized complete block design, split-block design, latin square design, … …) Replications = 3 or more 3. Cultivation Trial
Regional Tests of New varieties rias Regional trials(2-3 years) Production trial (farmer land production trial) Cultivational trial urposes Productivity test Adaptability and stability test Optimum growing location test
Regional Tests of New Varieties: Trials Regional trials (2-3 years) Production trial (farmer land production trial) Cultivational trial Purposes Productivity test Adaptability and Stability test Optimum growing location test
3. Analysis of Regional Trials (1)Experiment data(From individual locations Regional trials( or multi-year trials))区域试验或多年份试验 (2)Methods for analysis Combined variance analysis联合方差分析 For Yield advantage over cK and others Regression analysis For parameters of adapta bility and stability Regression coefficient(bi)回归系数 Standard deviation of regression(Sd)离回归标准差
3. Analysis of Regional Trials (1) Experiment data (From individual locations) Regional trials( or multi-year trials) 区域试验或多年份试验 (2) Methods for analysis • Combined variance analysis 联合方差分析 For Yield advantage over CK and others • Regression analysis For Parameters of adaptability and stability Regression coefficient (bi) 回归系数 Standard deviation of regression (Sdi) 离回归标准差
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