Study on drought resistance in six Camellia species at seedling stage
In order to select out some superior individuals with strong drought-resistance and to provide a reference for drought-resistance root stock breeding, taking one-year-old seedlings of six Camellia species as materials, including C. osmantha, C. meiocarpa, C. oleifera, C. vietnamensis, C. gigantocarpa and C. semiserrata, their drought resistance were reached and evaluated through the way of artiifcial control of irrigating to make soil naturally dry. The results show that:temporary wilting coefifcient and wilting coefifcient in C. semiserrata reach up to 5.09%and 3.11%respectively, which are signiifcantly higher than the other species, while the two indexes of C. osmantha are the lowest, just 2.42%and 1.10%respectively. The six Camellia species based on drought resistance from strong to weak in order is C. osmantha, C. meiocarpa, C. oleifera, C. vietnamensis, C. gigantocarpa, C. semiserrata. Drought resistance among individuals within species is in the separation. According to wilting coefifcient, they are divided into ifve drought-resistant types, including 0%-1%, 1%-2%, 2%-3%, 3%-4%and 4%-5%. Among them, C. semiserrata distributes at 3-5 levels, C. gigantocarpa distributes at 2-4 levels, C. Meiocarpa, C.oleifera and C. Vietnamensis only distribute at 2 and 3 levels, and C. osmantha only distributes at 1 and 2 levels.
NETL
NSTL
万方数据
维普
