ธาตุอาหารและธาตุพิษบางชนิดที่ตกค้างในดินและลูกข้าว ภายหลังการเติมเถ้าลอยลิกไนต์ในการปลูกข้าวพันธุ์ขาวดอกมะลิ 105 / วัลนิกา หมั่นเพียรสุข = Residual nutrients and toxic elements in soil and ratoon rice after applied lignite fly ash to main crop KDML 105 rice variety / Walnika Munpeansuk
The decreasing of outlay for rice planning. Rice Ratoon Croping is in tradition to produce rice that is the Wisdom Knowlage .They rice ratoon is grown with in tiller that is rice ratoon. In could the waste is used to substitute, for example, Utilization of lignite fly ash for agriculture applied for rice planning. But some toxic element is in compound of lignite fly ash. Then it is necessary to study in the macro element and some toxic element in soil and rice ratoon. That is the way to predict and planning for grow rice in next time. The suitable alternative to decreased of investment and safety. This study, therefore, focus on the effect of residual nutrient and some toxic element in soil and rice ratoon after applied lignite fly ash planting KDML 105 rice variety . Field experiment was continued to the experiment that, was carried out in paddy land (acid sulfate soil) at Nakonnayok Province by using randomized complete block design with 3 repilcations for lignite fly ash application rate 0.25 0.5 and 1.0 ton/rai. Plot size was 6x12 m.. The result showed that the macro element in soil at 3 period of time that soil in period of harvest, period of plough the ratoon tiller and period of after plough the ratoon tiller : Soil pH = 4.29-5.45 that was acid soil, Total- N = 0.22-0.32 % P₂O₅ = 19.00 – 38.33 ppm and K₂O = 54.00-114.00 ppm . And toxic element: Total-A; = 17300.00-30780.00 ppm that more than toxic level is soil. Total-As = 140.00-228.67 ppb Total-Cd = 0.22-0.79 ppb and Total-Ni = 0.14-0.21 ppm that was lower than toxic level is soil. And the macro element in rice ratoon, 4 part of rice ratoon that grain of Rice Ratoon, Rice Ratoon straw, Ratoon Tiller and Root of Rice Ratoon. :Total-N, P and K in the part of Rice Ratoon = grain of Rice Ratoon < Rice Ratoon straw < Ratoon Tiller < Root of Rice Ratoon. That was guide to management for prepare soil for next planting time. Then Ratoon straw, and Ratoon Tiller was ploughed to field that is the way to decrease investment for rice planting . And the toxic element in the part of rice ratoon that Total-Al is more over than toxic level in plants.