Effects of low solar radiation stress on growth and in vitro dry matter digestibility of Phleum pratense L. cultivars
1994
Furuya, M. (Hokkaido. Kitami Agricultural Experiment Station, Kunneppu (Japan)) | Masutani, T. | Tsutsui, S.
As a part of the study on the adaptability of timothy cultivars to environmental conditions and breeding of timothy of high quality, the effects of low solar radiation stress of short duration on growth and in vitro DMD were examined using the following cultivars: Kunpu (extremely early maturing), Senpoku (early), Nosappu (early), Erecta R.v.P. (medium) and Hokushu (late). Four clones of each of the cultivar were transplanted in a Wagner pot (1/5000a) that had been filled previously with a gleyic ordinary andsols, and cultivated outdoors for 50 days. At transplanting, each pot received 1 g of ammonium sulfate, 2 g of superphosphate of lime and 0.2 g of potassium sulfate. Three levels of shading treatment employed in this study were non (S0),52% (S1) and 80% (S2). Ten days after the transplantation, these plants were cultivated using S0. After treatment of 20 days, all pots were returned to S0 and cultivated for an additional 20 days. Two replications of each cultivar were then arranged in a split plot experiment design: main plot was solar radiation levels and split plot was cultivars
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