种植密度对贵烟5号农艺性状及经济性状的影响

为寻求贵烟5号适宜的种植密度，试验研究不同种植密度对贵烟5号农艺性状及经济性状的影响。研究结果表明：从农艺性状来看，种植密度对贵5号生育期、团棵期农艺性状影响不大；差异主要表现在现蕾期，最大叶长、最大叶宽随种植密度的增大而减小，以900株／667m2最高，达到68．6cm、37．4cm，1000株／667m2次之，达到64．8cm、34．6cm；移栽40d内，种植密度对根、茎、叶干重影响不大，移栽40d后，根、茎、叶干重表现出与现蕾期最大叶长相同的变化规律。从经济性状来看，产量随种植密度的增大而增加，以1200株／667m2（168．4kg／667m2）最高；产值、均价、上等烟率呈1000株／667m2＞900株／667m2＞1100株／667m2＞1200株／667m2的趋势，产值、均价、上等烟率以1000株／667m2最高，分别达到3933．2元／667m2、24．4元／kg、39．2％，较其它处理高0．2元／kg～4．2元／kg、112．0元／667m2～531．6元／667m2、0．4～13个百分点，推荐900株／667m2～1000株／667m2为贵烟5号适宜的种植密度。

The Effects of Planting Density on Agronomic Traits and Economic Traits of Guiyan-5

In order to search the appropriate planting density of Guiyan-5,different planting density’s impacts on agronomic traits and economic traits of Guiyan-5 was studied. It turns out that planting density has little influence on its agronomic traits in the grow-ing period and resetting stage;The key difference lies on the budding period in which leaf length will be shorter and width will be nar-rower with planting density increasing . Among them,planting density of 900pcs/667m2 ranks top that the length reaches 68. 6cm and the width reaches 37. 4cm;planting density of 1000pcs/667m2 is second,reaching 64. 8cm of length and 34. 6cm of width. Within 40 days of transplanting,planting density imposes little impact on root,stem and leaves;while after 40 days,those elements’dry weight shares the same change rule of the longest leave length in the squaring stage. From the aspect of economic traits,the output will in-crease as density increases,planting density of 1200pcs/667m2 (168. 4kg/667m2 )is the highest;The trend of 1000pcs/667m2 >900pcs/667m2 >1100pcs/667m2 >1200pcs/667m2 is demonstrated in the aspect of output,average price and rate of first-class to-bacco leaves and among them,1000pcs/667m2 is the highest,respectively reaching RMB 3933. 2/667m2 ,RMB 24. 4/kg and 39. 2%,which is RMB 0. 2/kg~ RMB4. 2/kg、RMB112. 0/667m2 ~ RMB531. 6/667m2、0. 4% -13% higher than other handling ways. Therefore,T1(900pcs/667m2 )~T2(1000pcs/667m2 )will be the suitable planting density for Guiyan-5.