Waterhyacinth [Eichornia crassipes (Mart.) Solms.] was partially controlled with 10.6 nm laser radiation. Radiation levels of < 1 J/cm2 for individually irradiated plants and 69 J/cm2 for group-irradiated plants significantly inhibited growth. Photosynthesis in treated plant-leaf tissue was inhibited about 50% by an exposure level of 4 J/cm2. 14C-labeled compounds fixed by plant-leaf tissue following laser treatment were found to be normally distributed.
Grazing preference of sudangrass varieties and hybrids was directly related to leafiness and factors of chemical composition as expressed in percent crude protein, crude fiber and total sugar. ‘Blackland,’ ‘Rhodesian,’ and ‘Sweet’ sudangrass were more palatable than other seed stocks studied and this palatability advantage was expressed to some degree in the actual grazing yield.
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