石刁柏留莖採收試驗初步報告

A Preliminary Report on 'Mother Stalk Method' of Harvesting Asparagus

一、對照區初期產量雖高，但採收期短，後期之嫩莖品質亦差；留莖區初期產量雖低，但探收期長，後期之嫩莖品質佳。二、留莖區之產量尤以大嫩莖之產量高於對照區的1.5倍，對於嫩莖之質量均有良好的影響。三、各旬之嫩莖含糖率變化而言，以留莖區較高，高溫之影響不大。四、測定地下IO公分深之地溫結果，留莖區地溫較對照區為低。對於嫩莖品質或嫩莖尖端早期散開現象影響為少。五、另依實地觀察結果，留莖區在採收嫩莖時較費力，且在雌株結實時須除去漿果以減少雌株養分之消耗，以利嫩莖生產。但留莖區遮蔭良好，嫩莖尖端純白，降雨後土壞較鬆對於嫩莖形狀有良好之影響。六、據本試驗探究結果，筆者前所倡導之母莖利用方法在熱帶圈石刁柏栽培上不但無不可之處，而且能改善嫩莖之品質，並能提高單位產量。

1.Noticing the problem of poor yield of asparagus in a Tropical area such as Tai wan, the auther has developed the so -called 'Mother stalk method' for the growing of asparagus. The method has been used during the aspar;1gus harvesting period at Taipei District Agricultural Improvement Station since 1955 and has become a method for extension to the asparagus farmers in Taiwan since 1961. 2.In order to clarify the effect of the mother stalk method, this experiment was conducted from February to October of 1965 at Taipei District Agri­cultural Improvement Station. 3.The results of the experiment have shown that both the quality and quantity of asparugus spears in the mother stalk method block have increased. 4.The investigation showed that soil temperature in the mother stalk method block was lower than that of the check block, especially on fine days. The difference of soil temperature ranged from 3.0'C to 3.3°C. The lowering of soil temperature in the mother stalk method block by preventing direct exposure to the sun is considered vital to the elongation and the quality of spears during the harvesting period 5.It is concluded that the mother stalk method is of great importance to asparagus growing in Taiwan.