ABSTRACT The experiments were conducted to evaluate the effects of silicon (Si) and phosphorus (P) application on crop productivity, grain quality, water-use efficiency (WUE), and soil enzyme activity in aerobic rice (AR) at Indian Agricultural Research Institute, New Delhi, India. Four levels each of Si (0, 40, 80, and 120 kg Si ha–1) and P (0, 30, 60, and 90 kg P2O5 ha–1) were tested in a factorial randomized block design (FRBD) replicated thrice. The growth, yield and quality of AR were enhanced with increasing Si and P application rates and a similar trend was observed for WUE and soil enzyme activity. The highest grain yield of AR was recorded with 120 kg Si and 90 kg P2O5 ha–1 followed by 80 kg Si and 60 kg P2O5 ha–1 and the lowest in control. The grain, straw yield and water productivity increased by 10–40%, 5–30%, and 10.2–39%, respectively in different treatments over control. Though, all studied parameters showed increment with increasing dose of Si and P; however 60 kg P2O5 and 80 kg Si ha–1 were statistically superior to their other respective doses. In conclusion, supplementation of Si and P fertilizers substantially increased the AR productivity in Trans-Gangetic plains of India (Figure 1).

中文翻译：

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在需氧水稻（Oryza sativa）中施用硅和磷对作物生产力、谷物质量、水分利用效率和土壤酶活性的影响

摘要 在印度农业研究所进行的试验旨在评估硅 (Si) 和磷 (P) 施用对需氧水稻 (AR) 作物生产力、谷物品质、水分利用效率 (WUE) 和土壤酶活性的影响。 ，印度新德里。Si（0、40、80 和 120 kg Si ha–1）和 P（0、30、60 和 90 kg P2O5 ha–1）的四个水平在因子随机区组设计 (FRBD) 中重复三次测试. AR 的生长、产量和质量随着 Si 和 P 施用量的增加而增强，并且 WUE 和土壤酶活性观察到类似的趋势。AR 的最高谷物产量记录为 120 kg Si 和 90 kg P2O5 ha-1，其次是 80 kg Si 和 60 kg P2O5 ha-1，对照最低。粮食、秸秆产量和水分生产力分别提高10-40%、5-30%和10.2-39%，分别在不同的处理上进行控制。尽管如此，所有研究的参数都显示出随着 Si 和 P 剂量的增加而增加；然而，60 kg P2O5 和 80 kg Si ha-1 在统计学上优于它们各自的其他剂量。总之，添加硅肥和磷肥显着提高了印度跨恒河平原的 AR 生产力（图 1）。