寒地优质超级稻龙粳21配套高产栽培技术研究

Study on Cultivation Techniques with High Yield of High-quality Super Rice Longjing 21 in Cold Region

为了充分发挥超级稻品种巨大的增产潜力，以寒地超级稻龙粳21为试材，通过对其不同播种时期、播种量、插植密度和施肥量进行研究，结合良种良法，组装集成其高产高效配套栽培技术。结果表明：龙粳21的适宜播种日期在4月15～20日，最佳播种量为200～250 g · m-2；最适宜的插植密度为25穴· m-2，插秧规格为30．0 cm ＆#215;13．3 cm ，每穴5株；最佳施肥量为纯氮130 kg·hm-2、P2 O565 kg·hm-2、K2 O 65 kg·hm-2时，产量可达到9 t·hm-2以上。

In order to give full play to the huge yield potential of super rice varieties ,taking super rice variety Longjing 21 as material ,its different sowing time ,sowing amount ,planting density and fertilization amount were studied ,and the high-efficient and high-yield cultivation techniques was assembled and integrated by the combination of superior rice varieties with superior method .The results showed that the suitable sowing date of Longjing 21 was from 15 to 20 in April ,the best sowing amount was 200~250 g·m-2 ,the most appropriate planting density was 25 hole·m-2 ,planting specification was 30 .0 cm× 13 .3 cm ,5 strains per hole ,the best fer-tilizer amount for pure N ,P2 O5 and K2 O were 130 ,65 and 65 kg·hm-2 respectively ,the yield could up to 9 t·hm-2 .