花生生理特性与库源比关系的研究

以花生新品种丰花1号高产栽培大田为材料,结荚初期人工摘除50%叶片、摘除50%果针,以不进行处理的作对照.在处理后前期,摘叶处理虽然单叶光合速率上升,LAI增长速率增大,对叶片减少有补偿效应,但是叶绿素降解加快,含量下降,衰老加快而形成早衰现象,物质积累少,单果重、生物产量、经济产量、经济系数低于对照.摘除果针处理单叶光合速率虽有降低,但叶绿素含量高,降解速度慢,明显延缓植株衰老,LAI一直处于高水平,物质积累量大,荚果充实好,生物产量、经济产量、经济系数显著高于对照和摘叶处理.这一结果可以解释化控过度、地膜覆盖结果过早过多、旱薄地营养生长不良及营养生长较弱的品种容易早衰的现象.

Studies on Physiological Characteristics and Leaf-peg Ratio for Peanut

Feng hua 1,the new breed of peanut,is used for study in high yield field,50% peg or 50% leaf in plantes are picked artificially in podding phase,natural plant is control. Although leaf decrease can be compensated a little by the increasing photosynthesis rate of single leaf and LAI high increasing rate,chlorophyll decomposes quickly and its content decreases,as accelerate the senescence of plant;then matter accumulation becomes little,and the weight per pod, biomass yield, economic yield and economic index are lower than that of control. Although peg-picked makes photosynthesis rate of single leaf descend,chlorophyll decomposes slowly and its content keeps high,as delay the senescence of whole plant. Then LAI keeps larger,matter accumulation gets much,pod plumpness is good,and biomass yield, economic yield and economic index are higher than those of control and the treatment of leaf-picked. It can be understood that chemical control is overused,peanut-mulched yields earlier and much more,and the breed whose nutrition growth is ill often senesces early.