榆林沙区樟子松人工林结实及促进措施研究
Study on the Fruiting and Promoting Measures of Pinus Sylvestris Plantations in Yulin Sandy Area
马存平 1贾艳梅 2马雅莉 2石长春 1曹双成 2曹庆喜 3刘世岐4
作者信息
- 1. 陕西省林业科学院,陕西 西安 710082;陕西榆林毛乌素沙地荒漠生态系统国家定位观测研究站,陕西 榆林 719000
- 2. 陕西省林业科学院,陕西 西安 710082
- 3. 陕西榆林毛乌素沙地荒漠生态系统国家定位观测研究站,陕西 榆林 719000
- 4. 榆林市榆阳区城郊林场,陕西 榆林 719000
- 折叠
摘要
笔者研究了榆林沙区樟子松的授粉特性及林分密度和立地条件对其结实的影响,并分析了施肥、修枝措施促进樟子松人工壮龄林结实的效果.结果表明,雌雄球花高峰期不同步,授粉不足,影响樟子松种子产量和质量.适宜的林分密度能有效提高樟子松的结实株率、球果产量和种子产量.不同立地条件樟子松人工林的结实株率、单株球果数、单果产种数、种子饱满率、种子千粒重、发芽率均表现为背风坡＞丘间地＞迎风坡.每年4月中旬、6月上旬施入复合肥0.30 kg/株,可使樟子松结实株率和种子千粒重分别提高13.77％和13.65％.与对照相比,修枝处理可使樟子松结实株率、种子千粒重、种子发芽率分别提高27.54％、15.02％和7.88％.
Abstract
The pollination characteristics of Pinus sylvestris in Yulin sandy area and the effects of stand density and site con-ditions on its fruiting were studied.The effects of fertilization and pruning measures on promoting the fruiting of Pinus syl-vestris strong aged plantations were analyzed.The results indicated that the peak period of male cones and female cones was not synchronized,and pollination was insufficient which affected the yield and quality of Pinus sylvestris seeds.Appropriate stand density could effectively improve the fruiting rate,cone yield and seed yield of Pinus sylvestris.Under different site conditions,the fruiting rate,cones number per plant,seeds number per fruit,seed plumpness rate,thousand seed weight and seed germination rate of Pinus sylvestris plantations all showed a trend of leeward slope＞hilly area＞windward slope.Applying compound fertilizer of 0.30 kg/plant in mid-April and early June each year could increase the fruiting rate and the thousand seed weight of Pinus sylvestris by 13.77％and 13.65％.Compared with the control,pruning treatment could in-crease the fruiting rate,thousand seed weight and seed germination rate of Pinus sylvestris by 27.54％,15.02％and 7.88％respectively.
关键词
樟子松/人工林/结实/促进措施Key words
Pinus sylvestris/Plantations/Fruiting/Promoting measure引用本文复制引用
基金项目
陕西省林业局科研项目(2020)()
陕西省一般研发计划专项(2020)()
出版年
2024
NETL
NSTL
万方数据