论文部分内容阅读
我省80年代初引进墨西哥(Cupressus Iustanica Mill.)种子,先后在成都试验场、玉蝉试验站引种栽培.近10年来全省成片造林4000余ha,新造人工幼林长势多数良好,高、径生长量大于四川垂柏(Cupressus funebris)的5～7倍;但由于墨西哥柏系商品种子,品质良莠不齐,加之造林时不适地适树,因而造成一部份地区树干的形质指标差.植株倒伏和严重倒伏的比例高达60～70%,致使大面积的人工幼林成林后不能成材.为探讨倒伏原因,我们从营养诊断、环境条件及栽培技术方面,对各引种区的墨西哥柏进行调查分析,现将结果总结于后:
In the early 1980s, the province introduced Cupressus Iustanica Mill. Seeds and introduced it to Chengdu Experimental Station and Yu Chan Station in succession. In the past 10 years, more than 4,000 ha have been planted in the province, and most of the newly planted young plantations have grown well. Growth is more than 5 ~ 7 times that of Cupressus funebris in Sichuan Province. However, due to the mixed quality of Mexican Cypress seeds and the unfavorable adaptability to tree planting, some parts of the tree trunk have poor quality index. And the proportion of severe lodging up to 60 ~ 70%, resulting in a large area of young plantations can not be a success after forestation.In order to explore the causes of lodging, we from the nutritional diagnosis, environmental conditions and cultivation techniques, the introduction of the Mexican Cypress survey , The results are summarized below: