| 摘要: |
| 用 MET10～200ppm浸种,可提高发芽势,降低α-淀粉酶活性,抑制芽仲长,促进根仲长(10～100ppm),使单位长度根重和芽重增加,秧田期施用 MET30～60g/亩或10ppm 浸种,在较低播量下,苗高无明显抑制,而分蘖则显著增加。本田分蘖期或第一苞分化期施用 MET,株高叶片和节间均被抑制,增加了叶片含糖量和叶绿素含量,降低叶片水势,使根系活力提高。由于上3叶变短,叶角度变小,透光率增加,相对生长率(RGR)、光合势(LAD)、净同化率(NAR)随之提高,但因叶面积指数下降,引起群体生长率(CGR)减少。MET 可提高有效穗数,增加粒重,但结实粒效减少,中高秆易倒伏品种在高肥水平下有增产效果,矮抗秆倒伏品种则表现减产。 |
| 关键词: MET 水稻 生育 |
| DOI： |
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| EFFECTS OF PLANT GROWTH RETARDANT ON THE GROWTH AND DEVELOPMENT OF PADDY RICE(Oryza sativa L.) |
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The Northern Rice Research Institute of Beiiing Agricultural University
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| Abstract: |
| Pot and field experiments were carried on to study the effect of MET on the growth,development and yield of paddy rice.The results were summa- rized as follows: 1.After seed soaked in 10-200 ppm MET solution,germinating potential was ra- ised,amylase activity reduced,shoot elongation inhibited,root growth accelerated, root and shoot weight per unit length increased. 2.When 30-60 g/mu MET was applied at nursery stage or 10 ppm MET solution was soaked at seed germination,the seedling height was inhibited insi... |
| Key words: MET paddy rice growth and development |
