High Sink Capacity Improves Rice Grain Yield by Promoting Nitrogen and Dry Matter Accumulation

Sink capacity, nitrogen (N), and dry matter accumulation (DMA) all play essential roles in promoting high rice grain yield, but their relationship is unclear. Here, a field experiment was conducted from 2020 to 2021 with Zhuangxiangyou Baijin 5 as the test cultivar. Two rates of N (T1 = 90 kg ha?1 T2 180 N) three transplanting densities (272,000 hills (M1), 238,000 (M2), 206,000 (M3)) were used investigate yield corresponding attributes. The results showed significant differences sink DMA, leaf area index (LAI) at heading stage among different treatments. that output T2M1 highest 2020, increasing by 16.6% compared lowest output, while T2M2 2021, 11.9% output. During LAI stage, maximum maturity recorded T2M1, T2M2. Furthermore, well levels higher T2M2, stage. Correlation analyses significantly positively correlated DMA. In addition, positive correlation between capacity DMA observed during both years, 2021. Thus, we conclude can increase because internal driving force yield. conclusion, regimen promising approach for improving paddy rice.