隆两优华占高产高效再生稻栽培技术研究

Longliangyou huazhan High Yield and Benefit Research Forratooning Rice Cultivation Techniques

2015~2016年在湖南永州对隆两优华占再生稻进行了喷施"九二○"、增施促芽肥、机收时稻田土壤水分含量、留桩高度对比等试验,试验结果表明:隆两优华占两季总产量最高,生育期适中,再生力强,抗逆性较强,是一个综合性状优良的再生稻品种;蓄留再生稻在前季稻齐穗后约15 d和再生稻破口期喷施"九二○"可明显提高产量;在肥力上等的田块增施促芽肥尿素10~12.5 kg/667m^2,在肥力中等和差的田块增施促芽肥尿素15 kg/667m^2,可显著提高再生稻产量;头季稻机械收割蓄留的再生稻产量低于人工收割蓄留的;蓄留再生稻以头季稻始穗后约18 d排水晒田再机械收割最适宜;机械收割留桩高度以25~30 cm为宜。

The comparison test on the ratiooning rice variety of Longliangyou huazhan were implementated from2015to2016in Hunanof Yongzhou,including spraying with“920”,adding bud fertilizer,determination paddy soil moisture content on harvesting time,andstubble height comparison test.The results showed that the Longliangyou huazhan was a ratooning rice variety of excellent comprehensivecharacters with highest yield in the two quarter rice production test,moderate growth period,stronger regeneration and resistance.Spraying“920”significantly increase the yield after ratooning rice heading around15d and breach period.Nitrogen bud fertilizer urea150-187.5kg/hm2in high fertility plots,adding bud fertilizer urea in225kg/hm2in the field of medium and poor fertility can significantly increaseyield of ratooning rice.The yield of ratooning rice harvested by machinery in first rice crop was higher than that of harvest artificial.It issuitable to storage for ratooning rice by18d drainage after initial heading stage of first season of rice,sunning the field,and mechanicalharvesting with stubble of25-30cm.