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三、影响施肥次数和效果的外界因素(一)光照:1918年,Kraus和Kraybill首先概述了光照强度与植物营养之间的基本关系.这一见解,在以后常被确认,例如光照强度和施肥对观叶植物光补偿点的影响(Collard等1977;Conover与Poole,1974;Joiner等1980;Milks等,1979).他们两人把植物分成四类:
External Factors Affecting Number and Effect of Fertilization (I) Light: Kraus and Kraybill first outlined the basic relationship between light intensity and plant nutrition in 1918. This notion was later identified as light intensity and fertilization (Collard et al. 1977; Conover and Poole, 1974; Joiner et al. 1980; Milks et al. 1979). The two of them divided the plants into four groups: