College of Pharmacy, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, Hawaii 96720, USA.
J Agric Food Chem. 2012 Oct 24;60(42):10398-405. doi: 10.1021/jf303617p. Epub 2012 Oct 11.
The nutrient composition of common guava, Psidium guajava L., and strawberry guava (waiwi), Psidium cattleianum var. lucidum, tree parts and fruits was determined during three seasons for six locations in Hawaii to assess guava as a potential feed for cattle. All guava plant parts were higher (p < 0.001) in crude protein than waiwi, but there were no differences in the fiber and energy densities for bark, shoots, and branches. Guava leaves were higher in fiber and had lower energy densities (p < 0.05) than waiwi. Ripe and breaker stage fruits were lower (p < 0.05) in fiber, similar in protein (CP), and higher (p < 0.05) in energy density than immature fruits. Guava fruits were higher in CP (p < 0.05) and organic matter (p < 0.001) and lower in ash (p < 0.001) than waiwi fruits. The primary nutritional concern with guava is low in vitro organic matter digestibility as compared to tropical forage grasses; therefore, it is not recommended as a feedstock for livestock.
对夏威夷六个地点的三个季节的普通番石榴（Psidium guajava L.）和草莓番石榴（waiwi，Psidium cattleianum var. lucidum）树体各部分和果实的营养成分进行了测定，以评估番石榴作为牛潜在饲料的可能性。所有番石榴植物部分的粗蛋白含量均高于 waiwi（p<0.001），但树皮、嫩枝和嫩枝的纤维和能量密度没有差异。番石榴叶的纤维含量较高，能量密度较低（p<0.05）。成熟和破口期果实的纤维含量较低（p<0.05），蛋白质（CP）相似，能量密度高于未成熟果实。番石榴果实的 CP（p<0.05）和有机质（p<0.001）高于 waiwi 果实，灰分（p<0.001）低于 waiwi 果实。与热带牧草相比，番石榴的体外有机物消化率较低，是其主要的营养问题；因此，不建议将其作为牲畜的饲料。
