南水北调中线工程核心水源区森林凋落物的持水特性

【目的】以鄂西北十堰市九华山林场的典型林分为对象,研究南水北调中线工程核心水源区森林凋落物的持水特性.【方法】采取凋落物尼龙袋浸水试验法.【结果】研究的5种建群种群落凋落物层贮量以马尾松林最大,达8.47t/hm^2,其次是亮叶桦林、日本花柏林、栓皮栎林、檫木+亮叶桦共建种群林(3.89t/hm^2).凋落物最大持水量为马尾松林(17.88t/hm^2),其次为亮叶桦林、檫木+亮叶桦共建种群林和栓皮栎林,最小为日本花柏林(7.96t/hm^2).凋落物持水率和吸水速率均以3种落叶阔叶混交林高于2种人工针叶林,2个指标均以檫木+亮叶桦共建种群林最大[304%和4 541.56g/(kg·h)],以日本花柏林最小[165%和2 146g/(kg·h)].【结论】落叶阔叶混交林凋落物层的水源涵养能力强于人工针叶林,在南水北调中线工程核心区发展落叶阔叶混交林可提高森林水文生态功能,减少水土流失.

Effect of Germination of Camellia oleifera Bud-Stock Grafting Induced with Various Hormones

[Objective] This study aimed to investigate the effect of growth regulators on the camellia （Camellia oleifera） bud stock cutting and to improve its survival rate by culturing thick and strong plumule. [Method] The effects of the different growth regulators 911 rooting agent, GA3 , ABT rooting powder on the germination ratio, the average germinating speed, the diameter of plumule and the survival rate of grafting shoots of camellia were compared and analyzed. [Result] The three growth regulators could significantly improve the growth potential of the plumules. The germination rate, plumule stem and survival rates of grafted plumules treated by the three growth regulators were much better than that of control. The germinating of camellia seeds treated with 911 rooting agent, GA3 or ABT rooting powder was 5, 7 or 9 d earlier than control; the diameter of embryo was 45%, 40% or 50% larger and the survival rate was 8%, 12% or 9% higher than that of control respectively. [Conclusion] The three hormones promoted the germination, the development of the roots including the lateral root and the fibrous, and improved the survival rate of cuttings. Among them, GA3 treatment produced the best efficiency.

发展黄金梨 振兴咸丰经济

发展黄金梨具有周期短、见效快、收益高的特点,咸丰县黄金梨发展形势较好,但在发展的过程中也存在一些问题,文章就发展过程中存在的问题,提出一些建议。

漆树栽培系统工程初探

本文提出了漆树栽培系统工程,论述了实施这一系统工程的必要性和构想,实现生漆发展的意义。