In order to evaluate the stability,high-yielding ability and discrimination of rice varieties in Liaoning Province,the data from 14 rice varieties and 6 test sites in the regional test of rice varieties in Liaoning Province in 2019 were analyzed by AMMI model.The results showed that highly significant variations was observed among environments,GEI(genotype and environment interactions)and genotypes,accounting for17.0％,49.72％and 14.19％of total variance,respectively.Two principal component in AMMI model could explain 75.6％of the interaction effect,and the interaction effect between genotype and environment could be effectively analyzed.The varieties Yuangeng-2(g4),Meifengdao-245(g2),Fuhedao-258(g5)belonged to high and stable yield variety.In terms of discrimination,Kaiyuan Demonstration and Multiplication Farm(e1)showed the strongest discrimination.
Genghe-205 was selected and bred by genealogy in Gongzhuling Songliao Institute of Agricultural Sciences with Tong-211 as female parent and Zhonghe-1 as male parent.It was approved by Jilin Province in 2023.In Jilin Province,the average yield was 9 619.70 kg/hm2 in two years of provincial regional test,which was 9.7％higher than that of the control(CK)variety Jiyugeng,and the percentage of increase in different regions was 100％.The breeding process,breeding innovation,characteristics and key cultivation techniques of Genghe-205 were summarized.
The effects of different side deep slow-release special fertilizer applications on rice growth and yield were studied.The experimental results showed that the treatment of Gurun and Hongsifang side deep slow-release special fertilizer could shorten the time of rice reaching full ear stage by 1 day,and the maturity stage was 1 day earlier than the other three treatments.At the harvest stage,the number of grains per spike and the seed setting rate were the highest when the special fertilizer was applied.Compared with the other 4 treatments,the treatment with Dongnong side deep slow-release special fertilizer had the highest yield,reaching 650.5 kg/667 m2,the number of grains per spike was 96.4 grains per spike,and the setting rate was 96.2％.
In order to explore the effect of nitrogen fertilizer reduction on rice blast control of Yangeng series rice varieties(lines)and the effect of rice blast on rice quality.25 newly bred rice varieties(lines)of Yangeng series and Yanfeng-47 were used for field tests.All varieties were transplanted at two levels of normal nitrogen application(180 kg/hm2)and 20％nitrogen reduction(144 kg/hm2)respectively to investigate the occurrence of rice panicle neck blast;The rice quality of Yanfeng-47 was determined by collecting the diseased panicles of Yanfeng-47,which were not diseased under two nitrogen levels,and the diseased panicles whose disease index no less than grade 5 at the normal nitrogen application level.The results showed that 20％reduction of nitrogen fertilizer application could reduce the occurrence of rice blast,and there was no significant difference in rice yield,processing quality,appearance quality and nutritional quality;The occurrence of rice blast can reduce the processing and appearance quality of rice such as brown rice rate,milled rice rate and head rice rate,as well as the nutritional quality such as protein content,amylose content,fatty acid content and taste value of rice.It can be seen that rice blast can affect rice quality,and 20％nitrogen reduction can reduce the occurrence of rice blast,thus improving rice quality without affecting rice yield.
In order to test the efficacy and safety of 40％pyristol pentazolol SC(Yingrun)and other agents against rice sheath blight,field trials were conducted.The results showed that:40％pyristol pentazolol SC(Yingrun)and other agents had a good control effect on rice grain wilt,and the effect was similar to that of local conventional agents,with no significant difference in control effect,and no adverse effect on rice safety after application.
