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采用二因素裂区设计,连续2年(2011—2012和2012—2013年)以川麦104和内麦836为对象,在小麦苗期、拔节期、孕穗期、开花期分别进行35 d的渍水处理,研究渍水对四川小麦生长和产量形成的影响.结果表明:苗期渍水减产最大,减产10%~15%,随渍水时期的后移,对产量的影响减小.苗期渍水降低了第3~6叶SPAD值、单株分蘖力和单株成穗数,降低了有效穗数、花后干物质积累量和成熟期干物质量.拔节期渍水降低了第4~7叶SPAD值,孕穗期渍水降低了倒4、倒3、倒2叶SPAD值,拔节期和孕穗期渍水导致花后旗叶SPAD值下降,渐增期灌浆速率(R1)和平均灌浆速率(Rmean)下降,千粒重下降.开花期渍水对产量影响较小.表明苗期渍水是四川稻茬小麦渍害临界期.
The two-factor fracturing design was adopted to study the effects of Chuanmai 104 and Neimei 836 for two consecutive years (2011-2012 and 2012-2013) on the 35-day-old wheat seedling stage, jointing stage, booting stage and flowering stage Water treatment to study the effects of waterlogging on the growth and yield formation of wheat in Sichuan Province.The results showed that the waterlogging yield was the largest at the seedling stage and the yield was reduced by 10% -15% Waterlogging decreased the SPAD value, the tillering ability per plant and the number of panicles per plant, and decreased the effective panicles, the dry matter accumulation after flowering and the dry matter content at maturity. 7 leaf SPAD value, waterlogging at booting stage decreased the SPAD value of down 4, down 3, down 2 leaf, waterlogging at jointing and booting stage, which led to the decrease of SPAD value of flag leaf after flowering. The increasing of filling rate (R1) and average filling (Rmean) decreased and 1000-grain weight decreased.The waterlogging water had little effect on the yield, which indicated that the seedling waterlogging was the critical stage of wheat injury in Sichuan rice cropping.