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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。
Using density and fertilizer two levels of different treatment level split design experiment, the black gem No. 1 under different density and fertilization levels, its growth period, individual stems and tillers dynamics, plant traits, ear grain structure and its high yield and resistance Inversions were conducted to investigate the effects of planting different density fertilizers on development and yield of herds in HeBei 1 along the Yangtze River in Jiangsu Province. Based on multivariate nonlinear regression analysis, high yielding agronomic practices were sought. The results showed that low density is not conducive to the formation of the ear, the density is too high will affect the number of grains per spike, too little fertilizer will constrain the development of individual groups, too much fertilizer will affect the grain number per panicle and grain weight, and easily lead to Lodging Reasonable combination of dense population can make coordinated development of individual groups, balancing the relationship between spike, grain, weight 3, access to higher yields. When the basic seedlings were 239.6 × 104 / hm ~ 2 and N application rate was 237.7 kg / hm ~ 2, the maximum yield potential was 7384.3kg / hm ~ 2. The reasonable interval for the dense fertilizer with the yield> 7 200 kg / hm ~ 2 is as follows: the basic seedlings are 200 ~ 270 × 104 / hm ~ 2 and the N application amount is 220 ~ 260kg / hm ~ hm ~ 2, applying N amount 210 ~ 270 kg / hm ~ 2.