摘要
烤烟干物质积累特征，在不施肥时表现为极慢－慢－较快；在Ｎ，Ｐ，Ｋ配合施用时表现为慢－快－慢，以旺长前期最快。不同器官干物重所占比重，根和茎随生育进程不断上升，叶则不断下降，且茎叶比重的升降在旺长前期最快。不施肥时烟株吸收Ｎ，Ｐ，Ｋ量都随生育进程不断增加；Ｎ，Ｐ，Ｋ配合施用时烟株吸Ｎ高峰在伸根期，吸Ｐ比较平稳，旺长期稍多，吸Ｋ高峰在旺长前期。烤烟产量与干物质及Ｎ，Ｐ，Ｋ养分积累量密切相关，在不同时期都可用直线方程ｙ＝Ａ＋Ｂｘ表达；干物质与Ｎ，Ｐ，Ｋ养分积累量的相关性则可用乘方方程ｙ＝Ａｘ￣Ｂ拟合。干物质与施肥量之间从旺长后期起也呈直线相关。
The dry matter accumulation characteristics of flue -cured tobacco was very slow-slow -fast under the condition of using no fertilizer,slow-fast-slow under the condition of combined usingof N,P,Kfertilizers , and it was the fastest in the former vigorous growing stage. The drymatter ratio in roots and stems increased gradually with the growing progress,while the ratioin leaves decreased gradually. The increase or decrease of dry matter ratios in stems and leaveswere the fastest in the former vigorous growing stage.The amount of N,P ,K absorption of tobacco plant increased gradually with the growingprogress under the condition of using no fertilizer, under the condition of combined using of N,P,K fertilizers, the summit of nitrogen absorption of tobacco plant was in the root extendingstage, the absorption of phosphate was somewhat even,a little larger in the vigorous growingstage. The summit of potassium absorption was in the former vigorous growing stage. The yieid of flue-cured tobacco was closely correlated with the amount of accumulation ofdry matter and N,P,K nutrients,it can be described with the linear equation y=A+Bx in dif-ferent periods.The correlation between dry matter and the amount of N,P,K nutrient accu-mulation can be imitated by the power equation y=Ax￣D. The correlation between dry matterand fertilization amount was also linear from the late vigorous growing stage.
出处
《江西农业大学学报》
CAS
CSCD
1995年第3期250-257,共8页
Acta Agriculturae Universitatis Jiangxiensis
关键词
烤烟
干物质积累
养分吸收
产量
flue-cured tobacco
dry matter accumulation
nutrient absorption
yield
corre-btion
