贵州高原水稻引种生态气候指标研究

Studies on Ecoclimatic Parameters for Rice Introduction in Guizhou Plateau

从水稻品种与生态气候方面入手，详细研究了增产幅度与气候变差、高度变差、生育期变差的相互关系，得出了水稻引种的生态气候指标。初步认为：当水稻引种地与原产地的气候变差小于７．０时，水稻品种的适应性较好，引种较易成功；贵州高原水稻引进品种增产幅度与原产地的海拔高度有关，高差越小，增产幅度越大；引进水稻品种生育期变差在７ｄ左右时，引种较易成功。

Detailed studies were conducted on the relations between rice yield increments and differences inclimatic elements,eievations and growth duration by analysing rice varieties and ecoclimiatic factors.and ecoclimatic parameters were derived for rice introduction. The following results were obtained:(1)When the climatic difference between the sites of introduction and origin is less than 7,the ricevarieties introduced tend to adapt the new environment better and may produce higher yields;(2 )InGuizhou Plateau,the yield incremets for the introduced rice varieties are corelaled with the elevationsof the original sites,the smaller the elevation defferences between sites are,the greater the yield incre-ments will result;and(3)Introduction is likely to succeed if the growth duration for the introducedvariety is less than 7 days.