|Title:||水田土壤特性與水稻收量之關係研究||Other Titles:||Characteristics of the Slate Alluvial Soils in Central Taiwan Associated with the Growth of Lowland Rice||Authors:||李予純
T.S. Lee Wang
|Issue Date:||2-Sep-1976||Publisher:||農業試驗所||Journal Volume:||25||Journal Issue:||3||Start page/Pages:||183-190||Source:||中華農業研究||Abstract:||
1. 土壤性質與稻穀產量之關係與稻穀產量關係最密切的土壤性質為土壤的陽離子交換總量(CEC)及有機質(O. M.)，有效磷(Available P)的含量，均與稻穀產量成顯著正相關關係；而土壤的pH及交換性鈣的含量則與稻穀產量有顯著負相關關係。
3．排水對稻穀產量之影響排水對二期作水稻產量影響較大。二期作排水處理較不排水者稻穀平均產量高14.05%，一期作則僅高4.51％。由土壤溶液測定知排水對其中PH值，NH4+及P的含量影響不大，但對其他成分含量的影響極大，即排水顯然減少土壤溶液中Total organic acid, HCO3-，K+，Ca2+，Mg2+，Fe2+及Mn2+的含量，且排水對二期作土壤溶液的影響較一期作為大。
The purpose of this study was to evaluate soil fertility, drainage or not as related to the yield of rice in the slate alluvial soils in central Taiwan. This was actually a continuous study of 1973.
36 soils selected from the Cho Shui irrigation area in central Taiwan were used in this greenhouse experiment. Two treatments, with and without drainage with two replicates, a total of 36×2×2=144 pots were arranged in the greenhouse in a randomized complete block design. 1 cm of water per day was drained from the pots of the drainage treatment.
Two crops of rice were planted in this experiment. The first crop was from February to August 1974, and the second, from August 1974 to January 1975. The results was more or less the same as the former experiment in 1973. It was summarized as follows:
1. The relation between rice yield and soil characteristics: Soil PH and its calcium content were the most important factors affected the grain yield, both were negatively correlated with yield. While as the cation exchange capacity, organic matter, and available phosphorus content of the soil were positively correlated with grain yield.
2. The relation between rice yield and chemical composition of the soil solution: The PH value, HCO3-, and Ca2+ content in the soil solution were correlated negatively with the yield of grain. While as the amount of NH4+, P, Fe2+ and total organic acid in the soil solution were correlated positively with rice yield. (the significant correlation between total organic acid and rice yield was actually due to the effect of total organic acid on the PH of the soil solution)
3. Effect of drainage on rice yield Drainage indeed increased the yield of rice. The effect was more significant in the second than the first crop. Drainage increased the yield of grain by 14.05% and 4.51% in the second and first crop respectively.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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