摘要
选择具有超高产潜力的水稻品种,采用精确定量栽培,结果表明:在贵州中低海拔山区生态条件下,水稻超高产达12 t/hm2以上;晚熟品种黔南优2058(17.4叶),38 d达到最高苗,分蘖率为211.42%;移栽期、分蘖盛期、分蘖临界期、拔节期、抽穗期单株干物质重分别为0.55、8.90、24.40、46.90、60.20 g,拔节期、抽穗期叶面积指分别为9.01和8.70;单穗灌浆速度前期(抽穗后20 d)每天增重0.15 g/穗,后期(抽穗20 d以后)每天增重0.148 g/穗。中熟品种益农一号(15.2叶),栽后33 d达到最高苗,分蘖率为204.75%;移栽期、分蘖盛期、分蘖临界期、拔节期、抽穗期单株干物质重分别为0.64、12.80、22.10、49.00、55.40 g,拔节期、抽穗期叶面积指分别为9.66和8.70;单穗灌浆速度前期(抽穗后20 d)每天增重1.42 g/穗,后期(抽穗20 d以后)每天增重1.24 g/穗。
The potential ultra-high-yield rice varieties were tested with cultivation techniques of accuarate and quantitative in medium-low altitude mountain areas ecological conditions in Guizhou.The ultra-high-yield rice varieties yield reached up to 12 t/hm2.Late maturing varieties Qiannanyou 2 058（17.4 leaves） reached up the maximum seedlings in 38 days,tillering rate of 211.42%;transplanting period,tillering stage,tillering critical,jointing stage,heading date single dry matter were 0.55,8.90,24.40,46.90 and 60.20 g,leaf area were 9.01 and 8.70 in jointing stage and heading date;single filling speed after heading stage（20 days）weighted 0.15 g/ear in one day,late（heading 20 days later）weighted 0.148 g/ear in one day.Medium-maturing varietiesYinong No1（15.2 leaves）reached up to maximum seedlings in 33 days,tillering rate was 204.75%;transplanting period,tillering stage,tillering critical,jointing stage,heading date single dry matter are 0.64,12.80,22.10,49.00 and 55.40 g,jointing stage,leaf area means were 9.66 and 8.70 in jointiong stage and heading date;single filling speed after heading stage（20 days）weighted 1.42g/ear in one day,late（heading 20 days later）weighted 1.24 g/ear in one day.
出处
《现代农业科技》
2010年第14期35-36,38,共3页
Modern Agricultural Science and Technology
基金
贵州省重大项目"贵州省粮食(水稻
玉米)高产科技示范工程"(黔科合重大专项字[2009]6001号)
关键词
中低海拔山区
水稻
超高产
生育特性
贵州省
low-altitude mountain areas
rice
ultra-high-yield
breeding characteristics
Guizhou Province
