宁夏羊草高产种子田建植技术研究

Technology for Planting of High-yield Leymus chinensis Seeds Field in Ningxia

本文从羊草不同移植密度、种子田最佳灌水组合、刈割次数(刈割量)、种子收获时间等方面研究羊草结实规律。通过采取一系列农艺措施,解决了羊草结实大小年、羊草有性繁殖"三低"等问题。结果表明:羊草结实适宜密度89万~100万株/667 m^2;宁夏干旱区每年可灌溉4次,每次灌溉量100 m^3/667 m^2;每年7月下旬刈割1次,羊草抽穗率可明显提高55.8%~162.6%;中科2号羊草种子最佳收获期为7月7日-12日,如果年均温较低可适当推迟3~5 d。该研究为宁夏引种羊草、建植高产种子田提供可靠的技术支撑。

In this paper, the seeding law of Leymus chinensis are studied from various aspects such as the different transplanting densities, the optimal irrigation combination of seed fields, the number of cuttings(cutting amount) and the time of seed harvesting. Through a series of agronomic measures, the problems of large and small years of Leymus chinensis and the "three lows" of sexual reproduction of Leymus chinensis were overcome. The results showed that the suitable density of Leymus chinensis for seeding was 0.89 million ~1.0 million plants/667 m^2;in the arid region of Ningxia, it could be irrigated 4 times a year, 100 m^3/667 m^2 each time;in the late July each year, 1 time cutting of Leymus chinensis could obviously increase the heading rate of Leymus chinensis to 55.8%~162.6%;the best harvest period of the seeds of Zhongke No.2 Leymus chinensis was between July 7 th to 12 th, and if the annual average temperature was low, it could be postponed for 3~5 days. This study provides reliable technical support for the planting of high-yield seed fields for the introduction of Leymus chinensis of Ningxia.