The Development of a New Soybean Variety Tainan No. 7, for Covering and Green Manure
Wu, C. H. and T. J. Lien
Tainan No. 7 is a new green manure soybean variety developed by The Tainan District Agricultural Improvement Station. It was selected from the local cultivar Chin-pi-do and went through the series of standard field evaluations followed the official protocols. The variety was developed for green manure utilization on fallow land and covering orchard for weed control. There are many good characteristics such as fast growing, high biomass, extended period of ground coverage, well adapted for rainfed cropping, superior drought and cold resistance. It was released with the agreement of The New Crop Cultivar Designation, Registration and Inspection Committee organized by the Council of Agriculture of the Executive-Yuan, R.O.C. Tainan No.7 is photosensitive to the long day length during the spring season. The maturities are 203~210, 175~186 and 88~100 days for spring, summer and fall seasons, respectively. The height of canopy is about 61.3 centimeters in the spring season and 62.3 centimeters in the summer season. The length of main stem is about 325 to 372 centimeters in the spring and 112 to 171 centimeters in the fall. It has purple flower and trifoliolate oval leaflets. The seed coat and hilum are brown. The 100-seed weight is 7 to 9 grams. The yield of green manure harvested in 80 days of growth is around 19,933 to 45,000 kg/ha, 22,150 to 41,500 kg/ha and 24,700 kg/ha for spring, summer and winter seasons, respectively.
Key words: Legume green manure, Cover cultivation, Breeding
Accepted for publication: 9 June, 2003