摘要:
研究了稻草不同还田方式和还田量对烟株养分吸收及烟叶产量和品质的影响。结果表明,(1)稻草还田能明显增加烤烟的生物量,腐解还田和直接还田优于覆盖还田,各处理效果一般与其用量呈正相关,但直接还田量超过5 250 kg·hm-2时效果反而下降;(2)稻草还田促进烟株体内N、P、K、Ca、Mg、Zn、Mn等元素的吸收累积,腐解还田和直接还田优于覆盖还田,对N、P、K的影响一般与还田量呈正相关,但对Ca、Mg、Zn、Mn的影响与还田量关系不明显;(3)稻草还田降低了中部叶的烟叶总糖、还原糖和糖碱比,提高了中上部叶的烟碱和总氮含量,对上部叶的影响以腐解方式最明显,一般与其用量呈正相关,对中部叶的影响以直接还田方式最明显,也与其用量呈正相关;(4)稻草还田不同程度改善了烤烟的经济性状,但稻草腐解还田和直接还田秸秆用量过大时,效果反而下降。
关键词:
-
稻草还田 /
-
烤烟 /
-
养分吸收 /
-
烟叶产质
Abstract:
Effect of straw-returning amount and manner on the nutrient uptake,yield and quality of flue-cured tobacco were studied in field condition.The results showed:(1) Straw-returning treatment increased shoot biomass apparently,the decomposed straw and direct straw-returning treatments were better than straw-covering treatment.The effeciency of straw-returning was positively correlated to the straw-returning,but the effeciency of direct straw-returning treatment descended when the amounts excessed 5 250 kg·hm-2.(2)Sstraw-returning treatment improved the accumulation of N,P,K,Ca,Mg,Zn,Mn in plant,the decomposed straw and direct straw-returning treatments were superior to straw-covering treatment.The accumulation of N,P,K was positively correlated to straw-returning amount generally,but the correlation between the accumulation of Ca,Mg, Zn,Mn and the amounts was unapparent.(3)The straw-returning treatment decreased the amounts of reducing sugar,TN and RS/Nie in middle leaves,meanwhile,increased the amounts of Nie and TN in top and middle leaves,the effect on top leaves was most obvious by decomposed straw-returning way,the relationship between effect and amounts showed positive correlation,the effect on top leaves was most obvious by direct straw-returning way,between effect and amounts also showed positive correlation.(4)The treatments improved the economic characteristics of cured tobacco,but the effeciency treatments of decomposed straw-returning and direct straw-returning treatments decreased when over-retruning the straw amounts.
点击查看大图
下载:
