Panicle silicon fertilizer optimizes the absorption and distribution of mineral elements in rice (Oryza sativa L.) in coastal saline-alkali soil to improve salt tolerance
Year: 2023
Type: article
Abstract: This purpose of this study is to elucidate the mechanism of silicon fertilizer on mineral element distribution at heading stage in rice. In this study, a field experiment was carried out in the coastal beach saline-alkali of Jiangsu Province (3.4 g kg-1 soil salinity, pH 8.3). The conventional japonica rice (Huaidao 5) was used as the material, and three silicon fertilizer amounts (0, 60 and 100 kg hm-2) were applied with panicle fertilizer at panicle initiation stage. The results showed that: (1) Silicon panicle fertilizer promoted plant nutrient absorption at heading stage, increased dry matter accumulation at mature stage, and increased yield, Si60 increased by 4.3% on average, Si100 increased by 8.6% on average. (2) Silicon panicle fertilizer optimized the distribution of K+ and Na+ in rice at heading stage. Silicon increase K+ content in leaves, upper sheaths and lower stems of rice, decreased Na+ content in panicles, upper leaves, sheaths and stems, and increased the K+/Na+ ratio in various tissues, thus improving ion homeostasis of rice. (3) Silicon panicle fertilizer promoted the accumulation of N, P, Ca, Mg, Fe, and Mn in leaves. Compare with Si0, the average increase of the two silicon treatments was 16.5% in P, 18.5% in Mg, 22.4% in Ca and 19.8% in Fe, and alleviated the adverse effects of saline-alkali stress on rice leaves. In summary, silicon panicle fertilizer optimizes the absorption and distribution of mineral elements in rice, reduced salt stress in young organs, promoted the accumulation of beneficial elements in leaves, improved nutrient absorption of rice, and the effect of 100 kg hm−2 was better.
Source: ACTA AGRONOMICA SINICA
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $941
OpenAlex ID: W7119542156