博优湛19高产栽培技术研究

A STUDY ON THE HIGH-YIELDING CULTIVATING TECHNIQUES FOR EARLY SEASON HYBRID RICE BOYOUZHAN 19

通过五元二次回归正交旋转组合设计试验，建立了博优湛１９主要农艺措施与产量的数学模型，通过模拟寻优频率分布分析了栽培措施对产量的影响，并通过通径分析研究了产量构成因素对产量的影响，结果表明：博优湛１９的主要增产途径是增加有效穗，其次是争大穗。配套的栽培技术模式是：５．４～５．７叶移栽，插植密度３９．６～４０．２万穴／ｈｍ２，施纯Ｎ１７０．７～１７５．８ｋｇ／ｈｍ２，Ｐ２Ｏ５１２５．４～１３０．２ｋｇ／ｈｍ２，Ｋ２Ｏ１２６．０～１３１．４ｋｇ／ｈｍ２，结合其它科学管理措施，可获得７８７５ｋｇ／ｈｍ２以上的产量。

The mathematical model about the relation between 19 main agronomic measurers and yield has been worked out by means of experimental design of positive cross retative regression block with five factors and two times. Though the analysis of frequeney distribution for seeking superiority, the effects of cultivating measures on yield are examined; through correlation and passage analysis, the effects of yielding component factors on yield are studied. The result shows that the major way to increase the yield of Boyouzhan 19 is to increase the number of effective panicles and to increase the size of each panicle. The pattern of related cultivating techniques is to transplant the rice shoot while it has 5.45.7 leaves with a planting density of 396000402000 holes/hm2, to apply pure N 170.7175.8 kg/hm2, P2O5 125.4130.2 kg/hm2, K2O 126.0131.4 kg/hm2 and meanwhile to use proper field management methods. This pattern will result in yield of over