落花生植物體內水分含量對其生育及子實收量之影響

Effects of Internal Water Content of Plant on the Growth and Yield of Peanuts

劉連勝(Lien-Sheng Liu)

《中華農業研究》 22卷1期 (1973/03) Pp. 47-53

https://doi.org/10.29951/JARC.197303.0006

摘要

爲確立利用植物體內水分的變異爲灌溉指標的技術，於民國57年秋作與民國58年春作，採用落花生品種臺南選九號（早生）、臺南七號（晚生）、臺農三號（中生）等3品種，調查葉片相對膨壓度之高低對於落花生生育及產量之影響，結果摘述如下：
1．相對膨壓度與土壤水分含量間其相關係數僅＋0.5658而已，但與氣象因素如氣溫、相對濕度、日蒸發量間其有高度的相關，其相關係數各爲－0.7566，+0.6844，-0.8012，而此等係數均極顯著，因此，相對膨壓度似受土壤水分含量影響較少而受氣象因素的影響較大。
2．每日下午1至2時之間落花生葉片相對膨壓度保持70%以上較70%以下者，其株高、分枝數、莢果數、種子千粒重及種子產量均增高，生育日數亦會增加。以相對膨壓度爲依據的灌概指標，與慣行的土壤水分含量或蒸發盤蒸發散量爲依據的灌溉處理間，其生育及產量並無顯著的差異。

並列摘要

The purpose of this investigation is to establish the irrigation criterion based on the variation of internal water content of peanut as indicated by the relative turgidity of peanut leaves. The study was conducted in Fall 1968, and Spring 1969, Using late maturing variety Tainon No. 7, intermediately maturing variety Tainon No. 3, and early maturing variety Tainon No.9, thes esults were as follows:
1. The correlation coefficient between relative turgidity and soil moisture content was +0.5658. However, more else relationships between turgidity and atmospheric condition were observed. The correlation coefficients between the turgidity and air temperature, relative humidity, and pan evaporation were-0.7566,+0.6844,-0.8012, respectively. The results indicated atmorpheric conditions had more effect in regulation the internal water balance of the plant than the soil moisture condition.
2. Peanut grown under high relative turgidity (above 70% between 1 to 2 P. M.) showed higher plant height, number of branch, number of matured pod, 1000 seeds weight, and grain yield than under the lower relative turgidity. There were no significant differences in growth and yield between different criteria such as relative turgidity, soil moisture, or pan evaporation.