The Effect of Different Shade Levels on Growth and Tuber Yield of Sweet Potato: II. Tuber Yield

作者: A. Oswald , J. Alkämper , D. J. Midmore

DOI: 10.1111/J.1439-037X.1995.TB01126.X

关键词: ConvolvulaceaeShadingBiologyField experimentGrowing seasonTubercleAgronomyShootCultivarIpomoea

摘要: Eight sweet potato cultivars (Ipomoea batatas Lam.) were grown under four different light regimes (0, 26, 42 and 60 % reduction (LR)) at two experimental sites of the International Potato Center (CIP) in Peru during 1990 1991 growing season. Increasing shade diminished tuber yield five cultivars, showed a tolerance for slight (26 LR) moderate (42 one had same full sunshine shade. Shade mainly reduced sink-size (tubers m -2 ) to lesser extent sink-strength. The growth plant top was hardly affected by shade; even favoured shoot development some cultivars. stronger sink conditions not only assimilate production as whole but also an altered partitioning.

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