盈江危地马拉草评价及推广应用

盈江危地马拉草是云南省盈江县有较长栽培历史的粗糙型热带牧草地方品种。多年多点试验结果表明,该品种早期生长缓慢,刈后再生性较弱,营养生长期长且营养价值保持相对稳定;年平均干草产量为12.57～19.22 t/hm2,比对照德宏象草低29.02%～42.55%,但干季可利用干草产量比对照德宏象草高166.36%～242.03%。在饲草的可利用季节上盈江危地马拉草与德宏象草有较强的互补性,二者相互配合有利于实现云南南亚热带地区饲草的全年均衡供应,适合南亚热带冬季霜冻较轻的地区推广种植。

Breeding and Applying of Tripsacum laxum Nash cv. Yingjiang

Tripsacum laxum Nash cv. Yingjiang is a local tropical rough pasture cultivar which has a long cultivated history in Yingjiang County of Yunnan Province. The results of comparison trial and regional tests in different regions for many years showed that this cultivar had slow growth in the early growing stage and poor regeneration after cutting, but longer duration of vegetative growth stage, and relatively stable nutrition value, and the annual average dry matter yields was 12.57~19.22 t/hm2, 29.02%~42.55% lower than that of Pennisetum purpureum Schum. cv. Dehong, but 166.36%~242.03% higher than that of cv. Dehong in dry season. This results indicated that there was strong complementary in forage seasonal availability between Tripsacum laxum Nash cv. Yingjiang and Pennisetum purpureum Schum. cv. Dehong, rational planting and using should beneficial to forage balanced supply of the whole year, and the suitable planting regions of Tripsacum laxum Nash cv. Yingjiang is in south subtropical areas, where there is only light frost in winter.