Lime and Zn interactions effects on yield, yield component, and quality of rice in Zn deficit tropical paddy soil
Shahram Mahmoud Soltani1*, Mohamed Musa Hanafi2,3, Abdul Wahid Samsuri3, Sharifah Kharidah4
A glasshouse experiment was conducted to investigate the lime and Zn application and interactions on rice, yield and yield components, and rice quality in various Zn deficit tropical paddy soil types. The tiller number, plant height and straw dry matter at maximum tillering and flowering stages significantly increased by the application of lime and both at 5 and 10 kg ha-1 Zn levels in Kundur (KUR) (pH= 5.2) and Telemong (TLM) (pH=7) soil series, whereas in Tepus (TEP) acid sulphate soil (pH=4), they increased in 5 kg ha-1 Zn and decrease at 10 kg ha-1. The grain per panicle(GPP), grain yield(GY), 1000grain weight(1000GW) and straw dry matter(SDW) significantly increased by application of Zn and increasing its levels. The highest increasing pattern were showed in Kundur (pH= 5.2) and Telemong (pH=7) soil series were recorded at 10 kg ha-1, whereas the highest and lowest values were obtained at 5 kg ha-1 and at 10 kg ha-1 in Tepus acid sulphate soil (pH=4). The highest grain and straw yield were obtained in TEP at 5 kg ha-1Zn level, which were 56 and 23% more than untreated Zn pots. The highest crude protein (CP) and grain Zn (GZn) were observed by 10 kg ha-1 applied Zn, 44% and 60% more than control, respectively. However, by lime addition CP and GZn decreased about 16 and 22% over the non-treated plots. The agronomic biofortification strategies such as Zn fertilization application and soil amendment addition improved rice MR219grain productivity and biofortification an average of 60%.
Keywords: Rice, Zinc, Lime, Tropical paddy soil, Biofortification