【摘要】 采用密度、肥料2因素不同处理水平裂区设计试验,对黑宝石1号在不同密度和施肥水平条件下,其生育期、群个体茎蘖动态、植株性状、穗粒结构及其丰产性和抗逆性进行了研究,探明黑宝石1号在江苏沿江地区种植不同密度肥料对其群个体发育和产量的影响,并通过多元非线性回归分析,寻求高产技术农艺措施。结果表明,密度过低不利于形成足穗,密度过高又会影响每穗实粒数,肥料过少会制约群个体发育,肥料过多又会影响每穗粒数和粒重,且容易造成倒伏。合理的密肥组合可使群个体间协调发展,平衡穗、粒、重3者关系,获得较高的产量。在基本苗239.6×104/hm~2、施N量237.7 kg/hm~2时,具有最大产量潜力7384.3kg/hm~2。产量>7 200 kg/hm~2的密肥合理区间为:基本苗200~270×104/hm~2、施N量220~260kg/hm~2,或者为:基本苗210~260×104/hm~2、施N量210~270 kg/hm~2。更多还原

【Abstract】 The growth period, population tiller dynamics, plant characters, paniclegrain structure, yielding ability and stress resistance of a wheat variety Heibaoshi 1 were studied using a two-factor split plot design to investigate the effects of different density and fertilizer levels on individual development and yield of Heibaoshi 1 in riparian region of Jiangsu Province. In addition, high-yielding agronomic measures were explored through multiple non-linear regression analysis. The results showed that low density was not conducive to the formation of panicles, while high density affected grain number per panicle; low fertilizer level restricted individual development, while high fertilizer level affected grain number per panicle and grain weight and was prone to leading to lodging. Reasonable combination of density and fertilizer could coordinate individual development and balance panicle, grain and weight,thus achieving a high yield. The yield potential was highest(7 384.3 kg/hm~2) under density of 239.6 ×104basic seedlings/hm~2 and N level of 237.7 kg/hm~2. When the planting density ranged from 200×104to 270×104basic seedlings/hm~2 and the N level ranged from 220 to 260 kg/hm~2 or the density basic seedling number ranged from 210×104/hm~2 to 260×104/hm~2 and the N level ranged from 210 to 270 kg/hm~2,the yield could exceed 7 200 kg/hm~2.更多还原