Method of improving lodging resistance of high-quality rice variety Xiangyaxiangzhan

Abstract

The invention discloses a method of improving the lodging resistance of a high-quality rice variety Xiangyaxiangzhan. The method comprises steps: (1) the target yield of Xiangyaxiangzhan is determined; (2) the land capacity yield is determined; (3) the reasonable total amount of nitrogen application is calculated, wherein the total nitrogen application amount calculation method is: the total nitrogen application amount (kg / mu)= [the target yield per mu (kg) - the land capacity yield per mu (kg)]*R / 100, R is a nitrogen application constant and refers to the nitrogen application amount for producing per 100 kg of rice on the basis of the land capacity yield, R has different values for early and late seasons, R=7 in an early season and R=8 in a late season; and (4) the nitrogen application ratio of a base fertilizer to a tillering fertilizer to a panicle fertilizer is reasonably distributed. According to climatic conditions, soil fertility and variety characteristics, the reasonable nitrogen application amounts during the full-growth period of rice and the planning and management ratio of the nitrogen fertilizer in early, middle and late stages of the rice growth are designed by the method, the number of stems and tillers during the rice growth process develops steadily, the population structure is reasonable, the plant height is shorter, the internode is shortened, and the lodging resistance of the variety is thus improved.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for improving lodging resistance of a high-quality rice variety Xiangyaxiangzhan. Background technique [0002] Ivory Xiangzhan is a thermosensitive conventional rice variety. The average growth period of early and late cultivation is 112-114 days, which is equivalent to that of japonica and indica 89. The plant is taller, the plant type is moderate, the effective ears are more, the ears are long, the grains are sparse, the late ripening color is good, the uniformity is good, the lodging resistance is medium, and the cold resistance is weak. The rice quality reaches the national standard and the provincial standard high-quality super grade, and the food quality score is 82 points. [0003] However, due to the high plant size and poor lodging resistance of this variety, it is very prone to lodging in the event of heavy wind and heavy rain after heading, thereby af...

AI Technical Summary

Problems solved by technology

[0003] However, due to the high plant size and poor lodging resistance of this variety, lodging is very prone to occur in heavy wind and heavy rain after rice heading, thus affecting yield and quality

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