摘要
为了及时、准确地掌握橡胶树营养状况,选择更适宜的采样时间来进行营养诊断指导施肥,通过田间试验研究了2008年10月、2009年4月、7月3个不同采样时间橡胶树叶片营养的差异。结果表明:2009年4月的叶片N、P、Mg含量与2008年10月份呈极显著正相关,而K、Ca含量相关不显著;2009年7月份叶片N、P、Ca含量与2008年10月份呈显著正相关,且Mg含量呈极显著正相关,但K含量相关不显著;2009年7月份叶片N、K含量与2009年4月份相关不显著,而P含量呈显著正相关,Ca和Mg含量呈极显著正相关。进一步分析表明,以2008年10月份来预测的2009年4月份N、P、Mg含量值与2009年4月份的实测值呈极显著正相关。因此,以当年10月份作为营养诊断采样时间来指导翌年橡胶树氮、磷肥的施用是较为合理的。
In order to choose a more appropriate time for sampling of the second generation rubber plantation nutrition diagnosis, field experiment was carried out to find the leaf nutrient content differences in October of 2008, in April and July of 2009. The results showed that： in April of 2009, leaf N, P and Mg content showed a significant positive correlation with that in October of 2008, while the K and Ca content showed a no significant correlation; in July, 2009, leaf N, P, Ca content showed a significant positive correlation with that of October, 2008, the Mg content had a highly significant positive correlation, while no significant correlation of K content; in July, 2009, leaf N, K content had no significant correlation with that of April, 2009, while the P, Ca, Mg content showed positively correlation. Further research showed that, the value of leaf N, P and Mg content forecasted by October, 2008, had a highly significant positive correlation with the actual determined value of that of April, 2009. Therefore, October of the the previous year could be a suitable sampling time for the nutrition diagnosis of the following year.
出处
《中国农学通报》
CSCD
2012年第13期32-39,共8页
Chinese Agricultural Science Bulletin
基金
国家天然橡胶产业技术体系建设专项资金(CARS-34-GW6)
关键词
橡胶树
营养诊断
采样
rubber tree
nutrition diagnosis
sampling
