頁籤選單縮合
題名 | 嘉南棉作豐歉與氣候=Yield Performance of Cotton and Climatic Factors in Chiayi-Tainan Plain |
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作者姓名(中文) | 孫貽謀; 楊俊彬; | 書刊名 | 中華農學會報 |
卷期 | 46 民53.06 |
頁次 | 頁28-33 |
關鍵詞 | 嘉南地區; 棉作氣候; |
語文 | 中文(Chinese) |
英文摘要 | 1. In the past 16 years, the sowing date of forecast trial and comparison test was on June 20th or later. The cultivating practice followed the standard for experiments. The cotton species used for analysis are G. arboreum L. var. Bengelanse and G. hirsutum L. var. punctatum. The average yield data of seed cotton in this province is adpoted from statistical record published by PDAF annually. 2. Negative correlation exist between the annual trial yield and the frequency of typhoon. The value is -0.5396 or less. 3. Correlation coefficient between the yield and the rainfall in growing season is -0.35 ±0.255. However, the rainfall in the cotton growing season was as low as 395 mm. only in 1957, while the yield of cotton ranked at the the first place in these 16 years . Likewise, the climatic condition and the cotton yield in 1963 are almost just the same as 1957. Moreover, the rainfall in August 1963 was particularly rare among these 16 years. The benefit of sparing rainfall in August upon cotton yield is obvious. 4. The correlation coefficients between the average yield in this province and the trial yields are 0.7194 and 0.7012 respectively. It means that the average yield could be forecasted by the trial yield. The upland cotton yield is highly correlated with that of Indian arboreum cotton. r=0.79 ±0.21. 5. On the standpoint of easiness of cultivation, the Indian arboreum cotton shows better performance than that of G. hirsutum L. However, G. hirsutum L. is the general type of cotton to be grown in Taiwan. 6. The net income of upland cotton growing in Taiwan is about 30% of investment, which amounts to N.T. $14,700 per ha. in current price. 7. The sowing date of cotton on June 20th or later proved to be the better one, as far as the weather conditions are conserned. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。