黑龙港低平原区人工草地苜蓿早期丰产技术研究

STUDIES ON EARLY-MATURING HIGH YIELD ALFALFA PASTURES IN THE LOW LAND OF HEILONGGANG DISTRICT

黑龙港低平原区的人工苜蓿草地,在传统种植方式和不加管理的条件下往往早期生长缓慢,群体小、产量低,二年生苜蓿地通常亩产只有250公斤;采用早期丰产技术并辅之以合理灌溉、施肥等农艺措施后,可促进苜蓿早期发育,缩短建群阶段,亩产量可提高到1000～1200公斤,增产140～380％,并使苜蓿提早三年进入产量盛期。

The alfalfa pastures in the low land of heilonggang region has developed adout 1 million mus in acreage. The traditirational cultivation methods in this district are prevented seeding or seeding on the stubbles. Those methods always cause slow growing, less roots developing, small community, short vegetation and a poor yield in alfalfa pastures. Generally, the yield of biennial alflafa pastures is about 250kg/mu. Adopting changed seeding model, which inclues a series of agronomy practices such as plouthing and levelling the fields, etc can improve the early stage developmant, promote the community forming of the alfalfa and increase the yield up to more than 600kg/mu. with reasonable irrigation and fertilization, on the above, basis the yieds of alfalfa may reach 1000～1200kg/mu. increased by 140～380％. Doing these, the alfalfa pastures may enter into the pumper period three years earlier than that of the traditional methods. The technology for early-maturing high yield alfalfa is easy to handling and adopting. If it can be applied to a large scale in alfalfa planting, the significant ccological and economical efficency will be realized.