Effects of postponing nitrogen topdressing on starch structural properties of superior and inferior grains in hybrid <i>indica</i> rice cultivars with different taste values.

(2022a) showed that the hardness of rice, amylose content, starch granules size, the proportion of amylopectin A chain and B1 chain showed a trend of decreasing first and then increasing as the proportion of postponing N topdressing, and the N application management of the base: tiller: panicle fertilizer=5:2:3 helped to increase the breakdown value, gelatinization enthalpy, reduce the setback value, improve the starch gelatinization properties, and ultimately reduce the hardness of rice and improve the taste.

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Starch granule size distribution As shown in Table 4 , the effects of each variety at different grain positions and N fertilizer management on the percentage of superior and inferior grains, small and large starch granules, and starch volume mean diameter (D[4,3]) reached significant or highly significant levels, and the interaction effect of the two factors was highly significant.

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