中部柑桔果樹之營養診斷及應用現況調查

The Investigation of the Nutrient Diagnosis and its Status of Application in Citrus Production in Central Taiwan

賴文龍(Wen-Long Lay) ； 王錦堂(Chin-Tang Wang)

《臺中區農業改良場研究彙報》 54期 (1997/03) Pp. 33-45

https://doi.org/10.6956/BTDAIS.199703.0033

摘要

The objective of the study was to evaluate the soil condition and fertilizer application suitable for citrus production. Samples of soil and leaf from 178 orchards were periodically collected and analysed.The results showed that orchards in the dark grey colluvial soils had the highest fruit yield of 28,185 kg/ha, while orchards in the yellow earth soils had the lowest fruit yield of 16114 kg/ha. In the soil series aspects, the Tlt soil sery in the grey yellow colluvial soils had the highest fruit yield of 39,675 kg/ha, while the Ylk soil sery in the yellow earth soils had the lowest fruit yield of 16,114 kg/ha. The investigated orchards fertilized with N element more than 700 kg/ha, had the lowest fruit yield of 18,519 kg/ha, while orchards fertilized with N-element less than 300 kg/ha had the highest fruit yield of 22,617 kg/ha, 18.1% higher than that of the lowest yield. In other words, excessive application of N-fertilizer lowered the yield significantly. Generally, increasing N-fertilizer application increased N content of leaf. The N-content in leaf higher than 3.3%, had the mean yield of 20,299 kg/ha and was 10.8% lower than that of the N-content in leaf of 3.0 - 3.2%, the approiated range literatured. The mean pH, organic matter, available P, exchangeable K, Ca and Mg content of the investigated soils are 4.90, 2.46%, 800, 446, 2,276 and 293 ppm, respectively. The mean of K content in leaf is 1.14%, lower than the appropriate low limit of 1.40%, and showed K diffiency from K-uptake inhibition. We concluded that twenty-seven soil series within five great soil groups are suitable for citrus production by the study. The total area are 35,695 hectares, including 26612 hectares distributed in 26 soil series within 5 great soil groups in Taichung Prefecture, 2,368 hectares in 8 soil series within 4 great soil groups in Taichung city, 4,170 hectares in 5 soil series within 2 great soil groups in Nantou Prefecture, and 2,545 hectaresin 3 soil series within 2 great soil groups in Changhua Prefecture.

關鍵字

柑桔 ； 土壤肥力 ； 土類 ； 適栽 ； 營養診斷

並列摘要

The objective of the study was to evaluate the soil condition and fertilizer application suitable for citrus production. Samples of soil and leaf from 178 orchards were periodically collected and analysed.The results showed that orchards in the dark grey colluvial soils had the highest fruit yield of 28,185 kg/ha, while orchards in the yellow earth soils had the lowest fruit yield of 16114 kg/ha. In the soil series aspects, the Tlt soil sery in the grey yellow colluvial soils had the highest fruit yield of 39,675 kg/ha, while the Ylk soil sery in the yellow earth soils had the lowest fruit yield of 16,114 kg/ha. The investigated orchards fertilized with N element more than 700 kg/ha, had the lowest fruit yield of 18,519 kg/ha, while orchards fertilized with N-element less than 300 kg/ha had the highest fruit yield of 22,617 kg/ha, 18.1% higher than that of the lowest yield. In other words, excessive application of N-fertilizer lowered the yield significantly. Generally, increasing N-fertilizer application increased N content of leaf. The N-content in leaf higher than 3.3%, had the mean yield of 20,299 kg/ha and was 10.8% lower than that of the N-content in leaf of 3.0 - 3.2%, the approiated range literatured. The mean pH, organic matter, available P, exchangeable K, Ca and Mg content of the investigated soils are 4.90, 2.46%, 800, 446, 2,276 and 293 ppm, respectively. The mean of K content in leaf is 1.14%, lower than the appropriate low limit of 1.40%, and showed K diffiency from K-uptake inhibition. We concluded that twenty-seven soil series within five great soil groups are suitable for citrus production by the study. The total area are 35,695 hectares, including 26612 hectares distributed in 26 soil series within 5 great soil groups in Taichung Prefecture, 2,368 hectares in 8 soil series within 4 great soil groups in Taichung city, 4,170 hectares in 5 soil series within 2 great soil groups in Nantou Prefecture, and 2,545 hectaresin 3 soil series within 2 great soil groups in Changhua Prefecture.

並列關鍵字

citrus ； soil fertility ； great soil group ； suitable cultivation ； nutrient diagnosis