一、 計畫目標: 本計畫目標是以小白菜為題材研究有機栽培用有機質肥料使避免農田因長期施用不正確有機質肥料而劣化降低收成.二、 重要工作項目: 本研究之第一年原擬製作C/N比10、15、及20之有機肥, 然而由於氮源主要用大豆粕, 碳源用太空包及稻殼等高木質素有機廢棄物, 在每星期只翻堆一次下, 其不同材料之均勻性可能不足, 造成氮之損失過大( 40-60% ).第二年度研究發現增加翻堆頻率, 可提高有機碳礦化率, 也確實提高氮回收率.用廢太空包取代蔗渣或用味素廢液取代豆粉提高氮回收率及有機肥製成率.本年度: 1.有機肥料製作: 本年度研究目的使用味素廢液降低雞糞堆肥廢pH及降低其氮之損失.處理及方法: A組用雞糞和蔗渣調製起始不同C/N值20、30、40之堆肥, 每三天翻堆一次.B組處理, 用味素廢液取代部分雞糞( 0、20、40、60、80% )和蔗渣, 將起始C/N值調30每三天翻堆一次製成堆肥.2.盆栽試驗: 將( 一 )中所製作有機肥料, 選其中四種堆肥同前一年之研究做盆栽試驗求以上所製作有機肥料之肥效, 並以化學肥料處理及完全不施肥處理做對照, 求有機肥肥效及養分回收率, 以做為推薦用量之依據.3.分析及調查工作: ( 1 )、有機肥製作過程中每隔一週採樣分析有機肥堆肥化過程中養分成分之變化.( 2 )、盆栽試驗: a.調查小白菜產量及養分吸收狀況.b.分析土壤化學性質之變化.三、 預期效益: 預期了解種植蔬菜用有機肥料製作時材料之選擇; 翻堆期間、成分之損失量、及肥效.A.The aim of this project: The aim of this project was to develop a principle to make organic fertilizer that is suitable to growing vegetables in organic farming farm.B.Results drawn from the first year showed that nitrogen losses were very serious during composting using soybean powder and bagasses.The loss situation of nitrogen during composting could be improved if glutamate wastes and mushroom medium were used to instead of bagasses.C.Material and methods proceeded in this year project: Composting: ( A )Chicken manure is used instead of soybean powder to compost with bagasses to make organic fertilizer to find the nitrogen loss rates in different C/N ratio composting material.( B )Glutamate waste is also used in composting to evaluate its effect on lowering pH and nitrogen loss in composting.Pot experiment: Pot experiment is carried out to evaluate the Pai-choi aim organic fertilizer on Pai-choi production and soil qualities.D.Effectiveness expected: A vegetable aim organic fertilizer is helpful for organic farming in growing vegetables and decreases the negative impact of using organic fertilizer on soil qualities
