Influence of long-term application of chaff cow manure compost on the yield and inorganic components of rice plant by coarse-textured gray lowland soils

We studied influence that a 14-year continuous use of the chaff cow manure compost gave to yield of the rice cultivar 'HINOHIKARI' in Coarse-textured gray lowland soils. Furthermore, we studied influence to give to on ingredient content in the soil, and the rice plant for 10 years. 1) The brown rice yield increased receipts in comparison with the chemical fertilizer-only plot when performed application of chaff cow manure compost continuously 0.5t - 2.0t. Furthermore, by the application of chaff cow manure compost 0.5t - 1.0t, there was the significant correlation between the brown rice yield and the number of years with product. The main factor of the increased receipts was increase in number of grains per head. 2) Regardless of the number of the quantity of having chaff cow manure compost application or not and application, We was not able to confirm the significant correlation between the brown rice yield and mean temperature, the highest temperature, minimum temperature, the change of the daylight hours. 3) When chaff cow manure compost continuously use 0.5 - 2.0t/10a, rise in pH, exchangeable bases, available phosphate, all carbon, all nitrogen, available nitrogen increased in comparison with chemical fertilizer-only plot and contributed to the increase in brown rice yield. On the other hand, convertibility potassium content, available phosphate contents increased in comparison with the chemical fertilizer-only plot remarkably when chaff cow manure compost continuously use 2.0t/10a. As for this, the long-term continuous use application of chaff cow manure compost 2t/10a suggests that load to soil environment is concerned about. The examination of technique to reduce quantity of fertilization corresponding to the accumulation of these nourishment is necessary in Coarse-textured gray lowland soils the future, too. 4) The change of the rice plant inorganic ingredient content had a bigger rice straw than brown rice. Furthermore, the rise in nitrogen density out of the brown rice which participated in seasoning occurred by a continuous use of chaff cow manure compost 2t. When the effective continuous use method of the chaff cow manure compost in the rice field of Coarse-textured gray lowland soils did 0.5t - 1.0t application per 10a in from the above in the beginning of June from the end of May 3-4 weeks before the rice transplanting, remarkable enrichment of the soil nourishment could restrain making it and the rise of brown rice nitrogen contents, and the increase of the yield could anticipate while securing a taste.