Monday, October 24, 2022
Tuesday, September 13, 2022
一般认为,种子园周围约()范围内,无同种树种即可起到隔离作用。A、400—900mB、100—300mC、1000m以上D、300—500m...
Friday, July 7, 2023
下列林中属于特种用途林的是()。A、护路林B、护堤林C、母树林D、水源涵养林...
Friday, August 4, 2023
Tuesday, September 13, 2022
Sunday, December 24, 2023
Monday, September 12, 2022
Tuesday, January 31, 2023
在选择优良林分的基础上,经留优去劣的疏伐改造而营建的采种林分是:()。A、母树林B、采穗圃C、无性系种子园D、实生苗种子园...
Tuesday, December 27, 2022
Monday, September 12, 2022
Wednesday, August 23, 2023
下列种子组合全适宜用普通干藏的是()。A、马尾松、杉木、侧柏B、杉木、桂花、银杏C、桉树、杉木、鱼尾葵D、桂花、银杏、假槟榔...
Tuesday, December 27, 2022
Monday, September 12, 2022
母树林每次间伐后郁闭度应保持在()A、0.3B、0.4C、0.5D、0.6...
Tuesday, October 3, 2023
Wednesday, October 11, 2023
Saturday, September 16, 2023
Tuesday, April 16, 2024
Sunday, May 5, 2024
生理后熟的种子适宜的催芽方法是()。A、水浸催芽B、层积催芽C、苏打水浸种D、微量元素浸种...
Wednesday, October 5, 2022
母树年龄影响插穗生根,扦插成活率最高的采条母树是()A、苗木B、幼树C、青年期树木D、成年期树木...
Wednesday, August 23, 2023