论文部分内容阅读
采用D-饱和最优回归设计试验,研究了通优粳1号在不同基本苗、施N量和多效唑化控条件下的生育期、群体茎蘖动态、叶面积、干物质积累、植株性状、穗粒结构和产量变化,探明其高产技术农艺措施。结果表明:密肥控三因素对产量影响程度依次为施N量>基本苗>多效唑施用量,增加基本苗和施N量有利于增加茎蘖和成穗密度,增加群体叶面积和干物质积累量。但基本苗和施N量过高,能降低成穗率和经济系数,延长生育期。适宜基本苗和施N量可协调茎蘖密度与成穗率之间的关系,保持灌浆期有较高的叶面积和干物质积累,提高产量。在基本苗55.2×10~4/hm~2、施N量339.2 kg/hm~2、多效唑用量97.9 g/hm~2时产量潜力最大,为12 606.0 kg/hm~2。产量>112 50 kg/hm~2的最佳农艺措施为:基本苗52.6~60.1×10~4/hm~2、施N量328.0~356.1 kg/hm~2、多效唑用量87.6~104.6 g/hm~2。
The optimum design of D-saturated regression was used to study the effects of Tongyoujing 1 on the growth, stem and tiller dynamics, leaf area, dry matter accumulation, plant traits, Spike grain structure and yield changes, proven high-yielding techniques agronomic measures. The results showed that the effect of three factors of dense fertilizer control on the yield was followed by the application amount of N> the basic seedling> Paclobutrazol. Increasing the basic seedlings and applying N could increase the tillering and spikelet density and increase the leaf area and dry matter accumulation the amount. However, the basic seedlings and Shi N is too high, can reduce the rate of becoming panicle and economic coefficient, to extend the growth period. Appropriate to the basic seedling and N application rate can coordinate the relationship between the stem tiller density and the percentage of spike, maintain a high leaf area during grain filling and dry matter accumulation, increase the yield. The maximum yield potential was 12 606.0 kg / hm ~ 2 when the basic seedlings were 55.2 × 10 ~ 4 / hm ~ 2, N application rate was 339.2 kg / hm ~ 2 and the dosage of paclobutrazol was 97.9 g / The best agronomic measures for yield> 112 50 kg / hm ~ 2 were as follows: basal seedling 52.6 ~ 60.1 × 10 ~ 4 / hm ~ 2, N application rate 328.0 ~ 356.1 kg / hm ~ 2 and paclobutrazol 87.6 ~ 104.6 g / hm ~ 2.