摘要
本研究表明，①水稻地膜旱育秧与水育秧膜内苗床表面温度（ｙ）与膜外气温（ｘ）呈极显著正相关关系，＾ｙ旱＝－２１９＋１４７ｘ，ｒ＝０９４４２，＾ｙ水＝－１２２＋１２７ｘ，ｒ＝０９６８３。②将籼稻和粳稻地膜育秧最早播种期的膜内苗床表面温度分别定为１２℃、１０℃，则籼稻地膜旱育秧与水育秧，粳稻地膜旱育秧与水育秧的膜外相应气温应分别达到９６５℃、１０４１℃、８２８℃、８８３℃。③籼、粳稻地膜旱育秧与水育秧分别达７５％、８５％、９５％，三种安全保证率的最早播种期（ｙ１～１２）与纬度（ｘ１）、经度（ｘ２）、海拔（ｘ３）间均呈极显著线性关系，符合＾ｙ＝ａ＋ｂ１ｘ１＋ｂ２ｘ２＋ｂ３ｘ３表达式，ｒ＝０８３９４～０８６９３，Ｆ＝４４４８３４～５９８１８４。④水育秧膜外气温分别达到２６１６℃和３０８８℃，旱育秧膜外气温分别达到２３２６℃和２７３４℃，就会造成秧苗徒长与烧苗。
This paper points out that highly significant positive correlations are observed between temperatures in film and out film for lowland seedling and upland seedling in thiner film (LSUSTF) of rice. The air temperatures of the earliest sowing safe date (ESSD) for LSUSTF of indica rice are 1041℃ and 965℃, those of japonica rice are 883℃ and 828℃. There are highly significant positive correlations between ESSD for LSUSTF of indica-japonica rice and longitude, latitude as well as altitude. The seedling would be injured when the air temperature out film gets over 2616℃ for lowland seedling and over 2326℃ for upland seedling.
出处
《四川农业大学学报》
CSCD
1998年第2期242-245,共4页
Journal of Sichuan Agricultural University
关键词
水稻
地膜育秧
膜内外气温关系
临界气温
RICE SEEDLING IN THINER FILM RELATION BETWEEN TEMPERATURES IN AND OUT FILM.
