Abstract: Studies on tiller regularity of the middle tillering part and productive forces of rice with main stem and differentt illeres of 14 t illering part of rice variety Gigeng 14 were carried out.The results show ed that there were two tiller turning points on the main stem of middle or late maturing rice variety. The main stem was divided into the below , the middle and the upper three partes. The tillering part of main stem 3-n1 means the middle tillering part. In the middle tillering part, up one g rade t illering of the main stem n part and below one grade t illering of the main stem n2 part follow st retching regularity of n2 tillering and tillering. During main stem grows two leaves at vertical tillering grade increases one grad at crossw ise. 1st grad tillering of n1 and n2 tillering parthave the biggest productive potent ial in all 1st g rad t illering; 2nd grade tillering of n3 and n4 tillering parthave the biggest product ive potentialit ies in all 2nd grade tillering; 3rd grade tillering of n5 and n6 tillering parthave the biggest productive potentialities in all 3rd grade tillering. Therefore if superiority of the middle tillering part is utilized rationally,there will be 14.9% potent ial of increase yield.

Key words: Rice, Middle tillering part, Tillering regularity, Productivity, Potential of increase production

CLC Number: 

• S511.101