不同利用方式下短花针茅草原生物量的形成规律

在内蒙古包头市达茂联合旗哈雅教学牧场 ,采用随机区组法对短花针茅草原在不同刈割时期、次数和高度下的生物量形成规律进行了研究 ,旨在探索短花针茅草原的合理利用方式 ,为草原放牧畜牧业生产实践提供理论依据。研究结果表明 ,短花针茅草原对刈割高度较为敏感 ,适宜的刈割高度为 2 cm;短花针茅草原植物生长缓慢 ,再生能力差 ,不宜于频繁利用 ,一年适宜利用 1 -2次 ;考虑牧草产量和营养物质含量 ,一年两次利用的间隔期应为 2 -3个月 ;一年一次利用的最佳利用期为 8月中旬以后。

Biomass Formation of Stipa breviflora Desert Steppe Under Simulating Utilization

This experiment was designed with randomized block method to measure the rules of biomass formation of Stipa breviflora desert steppe in different periods, frequencies of unitization and stubble height at Haya Teaching Ranch, Inner Mongolia Plateau in Damao Banner, Inner Mongolia. The purpose is to probe a rational utilization and provide the theoretical basis for production practice of native graziery. The results showed as follows: (1)The suitable stubble height was 2 cm; (2) the herbage may be used rationally for 1-2 times a year because of the slow growth and poor capacity of nutritive matters and balance of herbage supplement, the interval between the two times of utilization should be 2-3 months; (4) the optimum period of utilization for one time a year was after middle of August.