作　　者： ; ; ; ; ; ; ;

机构地区： 华南农业大学农学院

出　　处： 《中国农学通报》 2012年第5期300-305,共6页

摘　　要： 为了初步确定在气候变暖情况下广东水稻的最适播种期,通过采用早晚两季分期播种分期移栽的方法,研究了不同播栽期对水稻生育期和产量及其构成因素的影响。结果表明:不同播种期和季别对各品种生育期影响较大,早播种生育期延长,且早季比晚季的更加明显;‘天优998’和‘玉香油占’早季3月15日播种的实际产量最高,分别为7.450t/hm2和7.442t/hm2,而‘天优428’在3月10日播种的实际产量最高为5.975t/hm2;晚季中,7月16日播种的‘天优998’和‘天优428’实际产量最高分别为8.477t/hm2和8.055t/hm2,7月9日播期的‘玉香油占’实际产量最高为8.215t/hm2。相关分析表明,合适的栽培条件下,增加每穗粒数和有效穗数可以增加产量。研究结果为合理利用当地气候资源、合理安排播栽期和提高水稻产量提供理论依据。 To make sure the best sowing time in the case of global warming, effects of different sowing and transplanting date on growing period and yields and yield components of rice was studied with a method of sooner or later autumn sowing transplanting stage. Results showed that, one obvious impact was early planting to extend the growth period, and late season than early season more obvious in different sowing times with two seasons for all varieties. In early season, the actual highest yield of ＇ Tianyou998＇ and ＇Yuxiangyouzhan＇ was 7.450 t/hm^2 and 7.442 t/hm^2 respectively in 15 March planting and that of ＇Tianyou428＇ was 5.975 t/hm^2 in 10 March. In late season, the actual highest yield of ＇Tianyou998＇ and ＇Tianyou428＇ was 8.477 t/hm2 and 8.055 t/hm2 respectively in 16 July planting and that of ＇Yuxiangyouzhan＇ was 8.215 t/hm^2 in 9 July. Correlation analysis showed that, under appropriate cultivation conditions, increasing the number of grains per panicle and panicles can increase yield. The results provided a theoretical basis to improve rice yield, utilize rationally local climate resources and arrange reasonably seeding time.

关 键 词： 水稻 播种期 气候变暖 产量构成因素 广东

领　　域： [农业科学]