ผลของความเป็นกรด-ด่างของดินและปุ๋ยฟอสฟอรัสต่อประสิทธิภาพของราอาร์บัสคูลาร์ไมคอร์ไรซา Glomus intraradices ในดินที่มีการตรึงฟอสฟอรัสสูง
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Abstract
Abstract
The effects of soil pH and phosphorus (P) fertilizer on efficiency of arbuscular mycorrhizal (AM) fungi, Glomus intraradices, for hybrid field corn growing on soil with high phosphorus fixing capacity (Pak Chong soil series) was conducted in 4 x 3 x 2 factorial in CRD with 4 replications. The study consisted of 3 factors. The factor 1 was soil pH (no soil pH adjustment (pH 4.37) and soil pH adjustment to 5.0, 6.0 and 7.0). The factor 2 was P fertilizer rate (0, 50 and 100 % of P fertilizer recommendation rate). The factor 3 was AM fungi (without and with AM inoculation). The results revealed that soil pH and P fertilizer had effected on the efficiency of AM fungi. At 0 and 50 % of P fertilizer recommendation rates were applied to corn, it was found that the AM inoculation increased the growth, yield and P content of corn at all levels of soil pH. By contrast, at 100 % of P fertilizer recommendation rate, the AM inoculation did not effect on growth but increased yield and P content of corn at soil pH 5.0. In addition, the growth and yield of corn that was applied AM inoculation with 0 and 50 % of P fertilizer recommendation rate at all level of soil pH did not have the difference when compared to the corn that was applied 100 % of P fertilizer recommendation rates alone. Therefore, these results indicated that AM fungi, G. intraradices, can be applied to corn at all pH levels of high phosphorus fixing capacity soil with nil P or 50 % of P fertilizer recommendation rate. These were not difference in term of growth and yield when compared to 100 % of P fertilizer recommendation rate.
Keywords: arbuscular mycorrhizal fungi; high phosphorus fixing capacity soil; phosphorus fertilizer; soil pH
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References
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