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根据黄连的生长发育特点,可将黄连个体发育时期划分3个时期:生育前期(1-2年生)、生育中期(3-4年生)、生育后期(5年生)。黄连一生中最多形成叶片80多片叶子,1-5年生黄连每年每株发新叶分别为:8,10,17,26,35枚。黄连的叶面积在生育前期较小,在生育中期显著增加,最大达(652cm2/株),叶面积指数6.52。生净同化率(NAR)在生育前期,最大高峰值为(239.39g/m2.d),生育中期则显著下降。在生育前期,绝大多数干物质分配到叶上(占60%-80%),在生育中、后期,干物质分配到根茎的比率显著增大,大约占到30%-40%。黄连在每年的生长中心转移两次,第一次是在抽葶开花时期,这时的生长中心为叶;第二次是在根茎充实期,生长中心在根茎上。
According to the growth and development characteristics of Coptis chinensis, the individual development period of Coptis chinensis can be divided into three periods: pre-birth (1-2 years), mid-growth (3-4 years) and post-growth (5 years). During the life of Coptis, a maximum of more than 80 leaves are formed in the leaves. The annual leaves of 1 - 5-year-old berberine are 8, 10, 17, 26 and 35 respectively. Coptis leaf area in the early growth stage smaller, significantly increased in the second trimester, the maximum (652cm2 / strain), leaf area index 6.52. Net primary assimilation rate (NAR) in the early stage of fertility, the maximum peak (239.39g / m2.d), the second trimester significantly decreased. In the early stages of childbirth, the vast majority of dry matter is distributed to the leaves (60% -80%), and the ratio of dry matter to rhizomes is significantly increased in the middle and late stages of growth, accounting for about 30-40%. Coptis twice a year in the growth center of the transfer, the first time in the pumpkin flowering period, when the growth center for the leaves; the second is in the rhizome filling period, the growth center in the rhizome.