云南方竹出笋成竹规律

Shooting and Growth Rule of Chimonobambusa yunnanensis

对云南省澜沧县境内分布的云南方竹出笋成竹规律进行了研究。结果表明:云南方竹出笋期为9月下旬至11月上旬,历时约40 d;初期笋的成竹率最高(达91.67%),末期笋的成竹率最低;新竹秆高、胸径分别集中在3.51~5.00 m和1.51~2.50 cm;末期笋退笋较多,退笋高度主要集中在40 cm以下;引起云南方竹退笋的主要原因是养分供给不足,其退笋数占退笋总数的73.33%;云南方竹的高生长持续70 d左右,呈现出“慢—快—慢”的生长规律。研究结果可为云南方竹的推广应用提供科学依据。

This paper studies the rule of shooting and growth of Chimonobambusa yunnanensis distributed in Lancang County, Yunnan Province. The results show that the shooting period of C. yunnanensis lasts from late September to early November, about 40 days, and the rate of bamboo formation of early bamboo shoots is the highest(91.67%) while that of late bamboo shoots is the lowest. The height and DBH of new bamboo culm are 3.51-5.00 m and 1.51-2.50 cm, respectively, and at the end of the shooting period, there are more degraded shoots, the height of which is mainly below 40 cm. The main reason for C. yunnanensis shoot degradation is the insufficient nutrient supply, and the shoots degraded as the result accounts for 73.33% of the total degraded shoots. The height growth of C. yunnanensis continues for about 70 days, showing a “slow-fast-slow” growth pattern. The research results would provide a science basis for the promotion and application of C. yunnanensis.