Cultivation of the spring wheat ecotypes with different drought resistances

sterility tolernce and high water use efficiency is an important approach to realize self-supplying of grain food

returning farmland into grassland and woodland

recovery of vegetation

reduction of water loss and soil erosion.Through the study on 21 characters of spring wheat ecotypes with different drought resistances and sterility tolerance

the results shou that the major characters of causing variances of different ecotypes

firstly were the ratios of the number of two-grain spikelets

the number of four-grain spikelets and the number of three-grain spikelets to the total spikelets nmber of an ear respectively;secondly were plant height and the ratio of plant pattern.the basic characters of ecotypes with drought resistances and sterility tolerance were no (or few) four-grain spikelets

a lot of two-grain spikelets

a low grain count

low ratio if plant pattern

relatively plant height great

small flag area and high index of earinternode.It was ontrary to the ecotypes adapted to growing in wet and fertile soil.And it was the two aspects above that intermediated ecotypes.