Abstract:
Planting rice is an effective way to improve and utilize saline alkali land.This paper briefly introduced the parental source,breeding process,main characteristics and agronomic characters of Longdao 132 at tillering stage under salt alkali stress.Longdao 132 is a conventional japonica rice variety with good quality and stable yield,bred by Crop Tillage and Cultivation Institute,Heilongjiang Academy of Agricultural Sciences.Longdao 132 has been obtained from the crossing between" Longdao 10" (male)and"Jite 611" (female).From 2019 to 2020,the regional test yield was 8 365.5kg·ha
-1 and 8 534.1kg·ha
-1 respectively,and the production test yield in 2020 was 8 397.5kg·ha
-1.The regional test and production test yield increased by 8.4% compared with the control variety("Songgeng 9"),taste score was 82.Strong tillering ability is the main reason for its high yield.The adaptability of Longdao 132 to saline-alkali soil was not clear.The study found that tillering ability of Longdao 132 was significantly inhibited in saline-alkali soil compared with that of normal soil,which was only 63% of that of normal soil in the same period.The dry matter accumulation of Longdao 132 was decreased,and the dry weight of underground and overground was only 44% and 45% of that of the control,and the SPAD value was similar to that of the control.It is necessary to strengthen the research on the tillering and dry matter accumulation ability of rice varieties in saline alkali soil to improve the rice yield in saline alkali soil.