文档介绍：SS
Sorghum — Supramolecular chemistry
tall, late maturing, and generally unadapted. Since
Sorghum its introduction into the United States, the crop has
Sorghum includes many widely cultivated grasses been altered in many ways, these ing
having a variety of names. Sorghum is known as as a result of naturally occurring ic mutations
guinea corn in West Africa, Kafir corn in South Africa, combined with hybridization and selection work of
mtama in East Africa, and durra in the Sudan. In plant breeders. The rapid expansion in acreage came
India sorghums are called juar, jowar, or cholam; in with the development of widely adapted varieties
China, kaoliang; and in the United States, milo. Culti- and later higher-yielding hybrids. The fact that hy-
vated sorghums in the United States are classified as a brid grain sorghums with high yield potential could
single species, Sorghum bicolor, although there are be produced with stems that are short enough for
many varieties and hybrids. The two major types of harvesting mechanically (Fig. 1) made the crop ap-
sorghum are the grain, or harine, type, culti- pealing to many farmers.
vated for grain production and to a lesser extent for Grain sorghum is difficult to distinguish from corn
forage, and the sweet, or harine, type, used for in its early growth stages, but at later stages it
forage production and for making syrup and sugar. es strikingly different. Sorghum plants may
tiller (put out new shoots), producing several head-
Grain Sorghum bearing culms from the basal nodes. Secondary
Grain sorghum is grown in the United States chiefly culms may also develop from nodal buds along the
in the Southwest and the Great Plains. It is a warm-
season crop which withstands heat and moisture
stress better than most other crops, but extremely
high temperatures and extended drought may re-
duce yields. Sorghum responds well to optimum
growing conditions, fertility, and management to
produce large grain yields. It is