|Title:||水稻精準施肥決策系統初擬||Other Titles:||Fertilization Recommendation System for Rice in Taiwan||Authors:||陳琦玲
|Keywords:||水稻;施肥;決策系統;Rice;Fertilization;Recommendation system||Issue Date:||Jun-2002||Publisher:||農業試驗所||Related Publication(s):||應用於水稻精準農業體系之知識與技術||Start page/Pages:||167-178||Source:||農業試驗所特刊第101號||Abstract:||
Three major essential elements (N, P, K) are involved in current fertilization recommendation system. The fertilization recommendation for nitrogen is based on the results of experiments conducted in Taiwan, and adjusted with the crop productivity, organic material application, and soil properties. The crop productivity rankings are divided into four levels, modified from the ten levels of productivity rating of paddy in Taiwan. The higher the productivity the higher rate of fertilization is recommended. The rate should be deducted for the nitrogen released from the residue of the previous crop. The rate is deducted by the 90% recommended rate for the production of high prized rice. The rate was adjusted by 70% rate as long as the fertilizer was applied in deep- depth and was split into several dressings during rice growth. The rate for panicle initiation stage was dependent on the leaf chlorophyll value or remote sensing information. The amount of the individual three or four splits was decided by soil texture provided broadcast application is adopted. After nitrogen rate was decided, the actual fertilizer rate can be calculated with different kind of fertilizers. The recommendation rates for phosphorus and potassium were dependent on the levels of available P and K in the soil. The varieties of rice included in the system were Tainung 67, Taiken 8 and Taichung Sen 10. The fertilization recommendation system yielded from this project will be programmed and be completed by the end of 2002.
|Appears in Collections:||農業化學組|
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