黄河三角洲轻度盐碱地不同灌溉方式对水稻分蘖及产量的影响OA

The effects of brackish water irrigation patterns(mineralization degree of 1.2-1.9 g/L)on the growth dynamics of the tillers and grain yield of rice were studied in the experiment,which included freshwater irrigation(G1),freshwater-brackish water alternate irrigation(G2)and brackish water irrigation(G3).The results showed that there were no significant differences in the tiller number per hill between G1 and G2 treatments and between G1 and G3 treatments form the 6th day to the 36th day after transplantation.The tiller number per hill increased significantly from the 6th day to the 26th day after transplantation,with the tiller numbers being increased by 9.3,8.3 and 8.0 for G1,G2 and G3,respectively.The tiller numbers per hill increased by 0.9,0.7 and 0.8 for G1,G2 and G3 treatments from the 26th day to the 36th day after transplantation.There were no significant differences in plant height,panicle length,the number of effective panicles,the number of grains in every panicle and 1 000-grain weight among G1,G2 and G3 treatments.The grain yield for G2 and G3 treatments were decreased by 5.70%and 6.26%compared with G1,but the differences did not reach significance level.The results indicated that brackish water with low salinity did not generate significant influence on tiller growth,plant height at maturity,panicle length,the number of effective panicles,the number of grains per panicle,1 000-grain weight and yield in rice,which provides reference for rice production.