Studies on the Breeding of Anthocyanin-free Asparagus Varieties II

本試驗從倍數體間之雜交組合獲得之後代種子, 播種後調查,從2X,3X及4X後代個中初選多數無花青素品系

台灣蔬菜之無土栽培

The earliest recorded scientific approach to soilless culture in Taiwan was in 1969 in the form of gravel culture. Commercial-oriented water culture researches started in 1984 with rockwool culture initiatied in 1988. The total acreage of soilless culture in Taiwan is estimated to be about 35 hectares in 1990. Among the 35 hectares, 20 hectares are water-cultured water convolvulus, leaf lettuce, pei-tsai, chinese kale and amaranthus etc.; 13 hectares are rice-hull-cultured pea sprout; 1.2 hectares rockwool carnation and 0.5 hectare gravel cultured daylily. Soilless culture systems used includes : water level regulating system and forced circulating system (deep water type); improved NFT system; root-floating system and rockwool culture. Yamasaki’s n/w formula developed in 1976 for calculating solution composition was adopted or slightly modified to fit for each culture system. The optimum nutrient composition in culture solution for some tropical vegetables are shown below: 台灣之無土栽培始於1969年。礫耕、水耕於1984年，岩綿耕於1988年開始有經濟生產。目前栽培面積估計約有35公頃。其中水耕約20公頃，以蘿菜、葉萵苣、白菜、芥藍、筒蒿、莧菜等為主，岩綿耕1.2公頃以番茄為主，礫耕0.5公頃以金針菜為主。另有13公頃的木屑或稻殼耕，以生產豌豆苗為主。 栽培方式可分為水位調節法、強制循環法、養液薄膜法、浮根法和岩綿法。 養液之組成與濃度，大部分依據或修正山崎等所發表之n/w處方。另下列數種熱帶性蔬菜之配方，經試驗後，訂定如下