石灰質土壤聚積磷素之有效性研究
Other Title
The Availability and Transformation of Phosphorus Fertilizer in Calcareous Soils of Taiwan
Journal
中華農業研究
Journal Volume
35
Journal Issue
3
Pages
335-349
Date Issued
1986-09-10
Date
1986-09-10
Author(s)
李子純
吳懷國
陳桂暖
Tze-Shun Lee
Hwai-Gwo Wu
Kuei-Nuan Chen
Abstract
本研究目的爲明瞭磷肥在石灰質土壤中之有效陸及無機磷型態的經時變化，聚積於本省石灰質土壤中磷肥的型態及其有效性，有機物對累積磷素有效性之促進效果，並探討石灰質土壤中有效磷之最佳測定方法。
採取本省中、南部代表性石灰質土壤八種，分別加入0、20及300ppm p後，置於塑膠罐中，保持田間容水量狀態，以30℃定溫孵育，定期取出測定其有效磷及無機磷型態。同時將此八種土壤，置於溫室，分別加入300ppm p（均以Ca(H2PO4)2•H2O溶解後加入）後，連同其對照，保持田間容水量狀態五個月，進行磷聚積處理，處理過的土壤在溫室進行磷肥效應盆栽試驗。盆栽試驗分對照，加磷肥20ppm p，及加泥炭0.8%三種，作物分別種植玉米及高梁，發芽後約一個月收割，記錄產量，分析其磷含量，計算磷吸收量。有效磷的測定則分別以Olsen, Bray及Modified Bray三種方法進行，
Eight calcareous soils ranged from high to low in available P content were collected from central and southern Taiwan for this study. The changes of phosphorus availability as well as its inorganic forms were followed in the laboratory for 200 days when 0, 20, and 300ppm P were added in these soils. A P enrichment treatment was carried out in the greenhouse simultaneously. 300ppm P as monocalcium phosphate were applied in each of these eight soils and kept in field capacity for 5 months. The soils along with their check were then used in a phosphorus response experiment in the greenhouse. Corn and sorghum were planted respectively and the plants were harvested one month after emergence. Dry matter yield and P uptake were recorded. Available P was extracted by three different methods, i. e., Bray, Modified Bray, and Olsen.
Publisher
農業試驗所
Type
journal article
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