适于水稻旱作的水稻品种必须具备以下特性。1.熟期要适当。同一品种,旱作时要比淹水栽培生育期有所延长,加上水稻旱作不经育苗阶段,播种较晚。所以,在选择适用品种时,首先要注意其早熟性。一般要选用比当地水田插秧栽培的主栽品种早熟15天左右的品种。如用当地水田的主栽品种,将因不能充分成熟而减产。2.抗病性要强。水稻在旱作条件下,体内游离氮浓度较大,细胞表面矿质较少,通常较淹水栽培易发稻瘟病。所以,用来旱作的水稻品种,要对稻瘟病有较好的抗性。3.根系要发达。旱作水稻要选用根系粗壮、发达的品种,以便从土壤吸收较多的水分和养分,增强抗旱性。 Rice varieties suitable for paddy cultivation must have the following characteristics. Maturity should be appropriate. The same species, drought than the flooding cultivation and growth period has been extended, coupled with dry cultivation of rice without seedling stage, sow later. Therefore, the choice of suitable varieties, we must first pay attention to its precocity. Generally choose to use than the local paddy cultivation of cultivated varieties of cultivars precocious about 15 days of varieties. If the main varieties of local paddy fields, will not be fully mature and cut. 2. Disease resistance stronger. Under the conditions of dry cultivation, rice has higher concentration of free nitrogen in the body and less mineral on the surface of the rice, which is usually flooded and prone to rice blast. Therefore, the rice varieties used for drought-fighting should have better resistance to rice blast. Roots should be developed. Upland rice should use thick roots, developed varieties, in order to absorb more water and nutrients from the soil, and enhance drought resistance.