Abstract:

Experiment on water consumption change and influence of water and temperature during spring rape growth process at high altitude dry land was carried out by sowing method in order to research counter measure of crops planter under climatic change background. The results showed that: water consumption of whole rape growth period was between 254 mm and 286 mm at high altitude dry land. Water consumption of bolting-blossom stage was 6.9%-10.3% of whole growth period. Water consumption of blossom-mature stage was 32.3%-58.2% of whole growth period. Water consumption of bolting-blossom stage and yield assumed significant correlation (r=0.890). Water consumption of blossom-mature stage and yield assumed significant correlation (r=0.764). Rape yield increased 37.9 kg/hm2 because water consumption increased 1 mm. Consumption temperature ratio of different sowing period and yield assumed significant correlation (r=0.844). Rape yield increased 86.4 kg/hm2 because consumption temperature ratio increased 1 unit. Water use efficiency of rape different sowing and yield assumed significant correlation (r=0.981). Rape yield increased 313.5 kg/hm2 because water use efficiency increased 1 unit. Way of improving water use efficiency was discussed according to climate change.