Castanopsis tibetana of five different provenances （Jinxiu, Longsheng, Ziyuan, Hezhou and Leye） were selected as experimental materials to investigate the effects of treatments combining different root lengths and c...Castanopsis tibetana of five different provenances （Jinxiu, Longsheng, Ziyuan, Hezhou and Leye） were selected as experimental materials to investigate the effects of treatments combining different root lengths and contents of rooting agent on the growth of C. tibetana after transplanting of seedlings. The results showed that, there were significant differences in the preserving rate of C. tibetana seedlings between different provenances and different treatments. Among the 5 treatments, the seedlings of Hezhou provenance showed the maximum annual increment of ground diameter, and the seedlings of Ziyuan provenance exhibited the maximum annual increment of seedling height. Therefore, the germplasm from Hezhou provenance might be better than those from other provenances.展开更多
This paper studies the growth law of 23-year-old Castanopsis fissa planta- tion in Haiming forest farm （Pingguo County, Baise City, Guangxi Province） with the method of stem analysis. The results show that the avera...This paper studies the growth law of 23-year-old Castanopsis fissa planta- tion in Haiming forest farm （Pingguo County, Baise City, Guangxi Province） with the method of stem analysis. The results show that the average DBH, tree height and volume of the 23-year-old C. fissa plantation are 19.4 cm, 20.4 m and 0.326 1 m3 respectively. The fast growing periods of DBH, tree height and volume are the 2^nd- 8^th, 6^th-11^th, 6^th-23^nd year. Annual increment curve and average increment curve of volume haven＇t intersected in the 23 years, which means the 23-year-old C. fissais plantation has not reached the quantitative mature age. The growth equations of DBH, tree height and volume are D=1.713 3T-0.050 6T2＋0.000 7T2-1.942 2, H= 1.925 7T-0.039 8T2-2.489 0, V=-0.010 4T-0.002 4T2-4.084 8e^-0.005 T2＋0.012 7. Ac- cording to the volume regression equation of Castanopsis fissa, it will reach quanti- tative maturity in the 24~ year.展开更多
目前全球性的氮沉降和施磷肥不断增加对森林土壤产生重要影响。藜蒴(Castanopsis fissa)是我国南方重要的用材树种之一,研究外源性氮和磷对藜蒴林土壤养分和生化特性的影响,可以为藜蒴人工林的可持续经营提供理论指导。针对广东省云勇...目前全球性的氮沉降和施磷肥不断增加对森林土壤产生重要影响。藜蒴(Castanopsis fissa)是我国南方重要的用材树种之一,研究外源性氮和磷对藜蒴林土壤养分和生化特性的影响,可以为藜蒴人工林的可持续经营提供理论指导。针对广东省云勇林场一片立地条件相似的14年生黎蒴人工林进行为期2年的模拟氮和磷沉降,设置不施肥(对照)、施N肥、施P肥、施N+P肥4种处理,对应的氮和磷施用量分别为0,200 kg N,80 kg P and200 kg N+80 kg P(hm-2·a-1),每种处理有8个重复。结果表明,加N减少了土壤全P、全K和速效K含量,增加了土壤碱解N含量;加P提高了土壤有机质、全N、全P、速效P和速效K含量,减少了土壤全K含量;加N+P提高了土壤有机质、全N、全P、碱解N和速效P含量,减少了土壤全K含量。加N、加P和加N+P处理增加了土壤细菌、真菌数量及磷酸酶和过氧化氢酶活性。加P处理还增加了土壤放线菌数量及土壤脲酶活性,加N+P处理也提高了脲酶活性。展开更多
文摘Castanopsis tibetana of five different provenances （Jinxiu, Longsheng, Ziyuan, Hezhou and Leye） were selected as experimental materials to investigate the effects of treatments combining different root lengths and contents of rooting agent on the growth of C. tibetana after transplanting of seedlings. The results showed that, there were significant differences in the preserving rate of C. tibetana seedlings between different provenances and different treatments. Among the 5 treatments, the seedlings of Hezhou provenance showed the maximum annual increment of ground diameter, and the seedlings of Ziyuan provenance exhibited the maximum annual increment of seedling height. Therefore, the germplasm from Hezhou provenance might be better than those from other provenances.
基金Supported by Guangxi Forestry Science and Technology Project~~
文摘This paper studies the growth law of 23-year-old Castanopsis fissa planta- tion in Haiming forest farm （Pingguo County, Baise City, Guangxi Province） with the method of stem analysis. The results show that the average DBH, tree height and volume of the 23-year-old C. fissa plantation are 19.4 cm, 20.4 m and 0.326 1 m3 respectively. The fast growing periods of DBH, tree height and volume are the 2^nd- 8^th, 6^th-11^th, 6^th-23^nd year. Annual increment curve and average increment curve of volume haven＇t intersected in the 23 years, which means the 23-year-old C. fissais plantation has not reached the quantitative mature age. The growth equations of DBH, tree height and volume are D=1.713 3T-0.050 6T2＋0.000 7T2-1.942 2, H= 1.925 7T-0.039 8T2-2.489 0, V=-0.010 4T-0.002 4T2-4.084 8e^-0.005 T2＋0.012 7. Ac- cording to the volume regression equation of Castanopsis fissa, it will reach quanti- tative maturity in the 24~ year.
文摘目前全球性的氮沉降和施磷肥不断增加对森林土壤产生重要影响。藜蒴(Castanopsis fissa)是我国南方重要的用材树种之一,研究外源性氮和磷对藜蒴林土壤养分和生化特性的影响,可以为藜蒴人工林的可持续经营提供理论指导。针对广东省云勇林场一片立地条件相似的14年生黎蒴人工林进行为期2年的模拟氮和磷沉降,设置不施肥(对照)、施N肥、施P肥、施N+P肥4种处理,对应的氮和磷施用量分别为0,200 kg N,80 kg P and200 kg N+80 kg P(hm-2·a-1),每种处理有8个重复。结果表明,加N减少了土壤全P、全K和速效K含量,增加了土壤碱解N含量;加P提高了土壤有机质、全N、全P、速效P和速效K含量,减少了土壤全K含量;加N+P提高了土壤有机质、全N、全P、碱解N和速效P含量,减少了土壤全K含量。加N、加P和加N+P处理增加了土壤细菌、真菌数量及磷酸酶和过氧化氢酶活性。加P处理还增加了土壤放线菌数量及土壤脲酶活性,加N+P处理也提高了脲酶活性。
