粳系21—2特征特性及其栽培技术

The Main Characters of Jing--xi 21 -- 2 and Keys to Its Cultivation Techniques.

粳系21—2一般亩产400公斤左右,在安徽省区试和生产试验中,平均比鄂宜105增产5.8%。全生育期125—130天,株高80～90厘米,株、叶形适中,分蘖力中等,生长清秀,熟色好。平均每穗70余粒,结实率85—90%,千粒重约25克,米质优良。对主要病害有一定的田间抗性。适宜在中等肥力条件下栽培。其适宜播期为6月18—25日,秧田播种量40—50公斤,秧龄30—35天。大田亩栽2.5—3.0万穴,基本苗15—20万。在肥力中等田块,亩需纯氮9公斤左右,适当搭配磷钾肥。以基肥为主,早施追肥,后期控制用氮。够苗及时烤田,后期不断水过早,并加强病虫预防。

The grain yield of Jing xi 21 —2 was around 400kg/mu ,5. 8 per cent more than CK Er—yi105 in the provincial regional tests and production experiments. The main characters of Jing —xi 21—2 were as follows: The whole growth period duration 125 to 130 days,plant height 80 to 90 cm, moderate shape of plant and leaf;medium tillering ability,fair and fresh plant appearance,good maturing appearance,over70 spikelets /panicle,seed set percentage 85 to 90 per cent,1000 grain weight about 25 g ,good grain quality. The variety was resistant to main diseases and fit for the fields with middle fertility. Its appropriate sowing time was June 18 to 25,sowing norm 40 to 50 kg/mu,seedling age 30 to 35 days, 25,000 to 30,000 hills/mu, basic stems 150,000 to 200,000. And some other cultivation measures were also put forward.