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本文对灌南0801、东台0804、响水0802、溧水0803和招远0804等5个苦楝家系2 a根1 a干平茬苗在江苏东台沿海土壤条件下的年生长节律进行研究。上述5个苦楝家系在6月底到整个7月的苗高生长高峰期苗高生长量占全年总生长量的45.53%、46.47%、53.47%、48.22%和52.70%。6月～7月,地径生长高峰期地径生长量占全年总生长量的49.22%、48.73%、46.95%、46.62%和53.29%。溧水0803除与东台0804家系地径年生长量差异不显著外,其苗高和地径年生长量均值与其他家系的差异均达到显著或极显著水平,且均值最大。
In this paper, the annual growth rhythm of 2-year-old 1-year-old stubble seedlings of 5 Melia azedosineum families including Indica 0801, Dongtai 0804, Xiangshui 0802, Lishui 0803 and Zhaoyuan 0804 was studied under soil conditions in the coastal area of Dongtai, Jiangsu Province. The growth of seedling height in the five families of Melia azedarach reached 45.53%, 46.47%, 53.47%, 48.22% and 52.70% of the total growth in the whole year from the end of June to the whole July. From June to July, the annual growth of soil diameter was 49.22%, 48.73%, 46.95%, 46.62% and 53.29% of the total annual growth. Except for the difference between the annual growth of 0804 and the 0804 pedigree in Lishui 0803 was not significant, the differences of average annual growth of seedling height and diameter were significant or extremely significant with the largest mean value.