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根据江苏沿海地区水杉林带中３３ 株标准木生物量的测定资料，分析了不同立地类型、不同林龄阶段水杉林带生物产量的结构特征。结果表明：旱作田水杉林带总生物产量稍高于水旱轮作田，但旱作田水杉林带的干量相对分配率小于水旱轮作田，而根量、枝量和叶量的相对分配率则大于水旱轮作田；随着林龄的增长，两立地类型水杉林带的干量相对分配率相应增大，根量、枝量和叶量的相对分配率相应减少；旱作田水杉林带生物生产力高于水旱轮作田，旱作田年平均净生产量由６ ａ 生的３－３６１ ｔ／（ｈｍ２·ａ） 增至１９ ａ 生的１７－５９２ ｔ／（ｈｍ２·ａ） ，水旱轮作田则由５ ａ 生的２－４９１ ｔ／（ｈｍ２·ａ） 增至１５ ａ 生的１０－６２２ｔ／（ｈｍ２·ａ） 。
According to the determination data of 33 standard wood biomass in Metasequoia fir forest belt in coastal area of Jiangsu Province, the structural characteristics of biomass of Metasequoia glyptostroboides forest in different site types and ages were analyzed. The results showed that the total biomass of Metasequoia glyptostroboides in dryland was slightly higher than that in the field of dryland rotation and rotation, but the relative dry matter allocation rate of dryland wetland was less than that of dryland runoff. The relative amount of dry matter, The allocation rate of dryland was higher than that of dryland rotation cropland. With the increase of forest age, the relative dry matter allocation rate of two types of Metasequoia glyptostroboides increased correspondingly, and the relative allocation rate of root amount, branch amount and leaf amount decreased correspondingly. The biological productivity of Metasequoia lanceolata was higher than that of irrigated fields. The average net production of dry land increased from 3-361 t / (hm2 · a) in 6 a to 17-592 t / (hm2 · a) in 19 a ), And the rotation and crop rotation ranged from 2-491 t / (hm2 · a) of 5 years to 10-622 t / (hm2 · a) of 15 years.