本文選題：粳稻　切入點(diǎn)：抽穗期　出處：《西南農(nóng)業(yè)學(xué)報(bào)》2017年12期

【摘要】：【目的】夏季低溫冷害是云南水稻減產(chǎn)的主要原因之一,文章為準(zhǔn)確評估、預(yù)測低溫冷害對水稻產(chǎn)量的影響展開研究�！痉椒ā炕�36年水稻物候和空殼率及氣候資料,使用相關(guān)、主成分和回歸分析與典型年水稻冷害氣候分析相結(jié)合,研究粳稻夏季低溫冷害的氣候特點(diǎn)和指標(biāo)�！窘Y(jié)果】孕穗抽穗期是粳稻低溫冷害的主要敏感期,滇中地區(qū)一季稻夏季冷害對夜間低溫較為敏感,最低氣溫是引發(fā)冷害的首要因素;滇中夏季氣溫典型偏低、多雨寡照特征和氣溫波動(dòng)明顯,從而易于引發(fā)水稻低溫冷害�！窘Y(jié)論】連續(xù)2 d最低氣溫均值15.5℃、連續(xù)3 d最高氣溫均值22.5℃可作為滇中水稻夏季冷害的參考性臨界指標(biāo);使用抽穗前11-5 d最低氣溫和抽穗前2 d至抽穗后4 d最高氣溫及此二時(shí)段平均氣溫構(gòu)建了夏季低溫冷害綜合指標(biāo)H,它與水稻空殼率呈高度負(fù)相關(guān),對滇中粳稻夏季低溫冷害有一定的表征能力。
[Abstract]:[objective] low temperature chilling injury in summer is one of the main reasons for rice yield reduction in Yunnan. In order to evaluate and predict the effect of low temperature chilling injury on rice yield in Yunnan province, the effect of low temperature chilling injury on rice yield was studied. [methods] based on 36 years' rice phenology, empty shell rate and climate data,Using correlation, principal component and regression analysis and climate analysis of rice chilling injury in typical years, the climatic characteristics and indexes of cold injury in summer of japonica rice were studied. [results] booting heading stage was the main sensitive period of cold injury in japonica rice.The summer chilling injury of one-cropping rice in central Yunnan is sensitive to the night low temperature, and the lowest temperature is the primary factor causing the chilling injury, the summer temperature in central Yunnan is typically low, the characteristics of heavy rain and little light and the fluctuation of temperature are obvious.[conclusion] the mean minimum temperature of 15.5 鈩，

本文編號(hào)：1719305