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我省水稻生长期间的气象条件,有哪些优势和劣势?明确这个问题有助于认识我省水稻冷害的特点,研究和采用趋利避害的措施,保证水稻高产稳产。现选择常受冷害威胁的云南、东北和日本北部等三个一季稻区,分别以昆明、怀德、扎幌为代表,按当地一般水稻的生育阶段,将几项气象因素列于附表(1)。据附表(1),对照水稻各生育时期对温度、光照的要求,可以看出,我省水稻生长期间的气象条件优势有三,即育秧期、返青——分蘖期和灌浆成熟中后期;劣势有一,即抽穗开花期(及其前后)。现分别说明如下。 (1)育秧期: 育秧期日平均气温,昆明较怀德、扎幌
Meteorological conditions during rice growth in our province, what are the advantages and disadvantages? A clear understanding of this issue will help identify the characteristics of rice cold damage in our province, research and the use of measures to avoid disadvantages, to ensure high and stable yield of rice. Now choose three one-season rice planting areas, such as Yunnan, Northeast China and northern Japan, which are often threatened by chilling injury, and take Kunming, Huaide and Sapporo as representatives respectively. According to the growth stage of local general rice, several meteorological factors are listed in the attached table 1). According to the table (1), according to the requirements of temperature and light in each growth period of rice, we can see that there are three advantages of meteorological conditions during the rice growing season in our province, namely, the seedling stage, greening-tillering stage and middle and late filling stage; One, that is, heading and flowering (and before and after). Now separately as follows. (1) Seedling Raising: The average daily temperature of seedling raising, Kunming, Hua De, Sapporo