| In order to search for countermeasures of crop pla
nting under the background of climatic change, the response of yield of spring r
ape to available soil water storage and heat was studied in dryland of high ele
vation area by staging sowing method. The results showed that the soil water sto
rage in dryland of high elevation area was more in the early growth period than
that in the late growth period. The influence of available soil water storage t
o yield was relatively low in seedling and blossom period, but it was rather hig
h in bolting, flowering and pod development period. There were significant posit
ive correlations between rape yield and soil water storage in bolting, flowering
and pod development period. When soil water storage increased by 10mm during bo
lting and flowering period, the rape yield could be improved by 71.7 kg·hm-2; when it increased by 10mm during pod development period, the rape yield cou
ld be improved by 30.13 kg·hm-2. Heat was also an important factor affect
ing rape yield. There were significant negative correlations between rape yield
and daily mean temperature as well as accumulated temperature. When daily mean t
emperature rose by 1℃, the rape yield could be reduced by 163 kg·hm-2; w
hen accumulated temperature rose by 50℃·d, the rape yield could be reduced by
251.15 kg·hm-2. Different planting response measures were proposed accord
ing to the growth characteristics of rape under different climatic conditions. |