冷地早熟禾种子生产的优化栽培技术研究

Study on Seed Production of Poa crymo phila Keng.

采用３因素５水平二次回归正交组合设计试验，建立了冷地早熟禾种子产量（Ｙ）与播种量（Ｘ１）、行距（Ｘ２）和施肥量（Ｘ３）的回归方程：Ｙ＝４２．６１＋５．０１Ｘ１－７．８１Ｘ２＋７．７７Ｘ３－２．２１Ｘ１Ｘ２＋１．４１Ｘ１Ｘ３－０．４１Ｘ２Ｘ３－４．６４Ｘ１２＋６．３６Ｘ２２＋８．５６Ｘ３２；并提出西宁地区冷地早熟禾种子生产的优化农艺措施：播种量８ｋｇ／ｈｍ２，播种行距２０～３０ｃｍ，种肥（磷酸二铵）１５０～１８７．５ｋｇ／ｈｍ２。

Experiment designed as quadric regression orthogonal combination at 3 factors and 5 levels has been conducted. The regression equation on seed yield(Y), sowing rate(X 1), row space(X 2) and fertilizer amount(X 3) for Poa crymo phila Keng seed production has been worked out as following: Y=42.61+5.01X 1-7.81X 2+7.77X 3-2.21X 1X 2+ 1.41X 1X 3 -0.41X 2X 3-4.64X 1 2+6.36X 2 2+8.56X 3 2, Data package for optimal seed production in Xining area is suggested as following: sowing rate 8kg/hm 2, row space 20～30cm, fertilizer application (NH 4HPO 4) 150～187.5kg/hm 2.