中熟陆地棉高产株型经济性状时空分布的数学模型

Mathematic Model of Time and Space Distribution of Economic Characteristics for High Yield Plant Structure of Middle-Riping Upland Cotton

通过对陆地棉中熟品种高产株型经济性状的时空分布的数学模拟得出,成铃率、衣分、籽重、纤维主体长度的空间分布模型为(?)=b_0+b_1x_i+b_2x_j,铃重、绒长、纤维强度的空间分布模型为(?)=b_0+b_1x_i+b_(11)x_i^2+b_2x_j,棉铃增长的时间分市模型为(?)=K/(1+aexp(-bT),铃重、衣分的时间模型为(?)=a+bT.根据模型导出,高产棉株中下部果技成铃率占75%左右,1～2果节成铃率占80%～90%.在时间上应力争7月15日～8月15日这段优质铃开花结铃时间多结铃,以达到上述指标,确保棉花早熟、优质、高产.

According to the mathematic simulation of time and space distribution of economic characteristics on high yield plant structure of middle -riping upland cotton,the space distribution model of the rate of boll,ginning outturn,seed weight and staple of firber has established. That was yij = b0+b1x1+b2xj. The space distribution model of boll weight,staple and firber strength was yij=b0+b1xi+b11xi2+b2xj. The time distribution model of bollincreasing was and tne time model of boll weight and ginning outturnwas y=a + bT. According to the mathematic models ,the rate of boll for high yield cotton in middle and low part fruit branch was about 75% and the rate of boll in the 1at^2nd fruit branch joint was 80%~90%. If flowlering and boiling has taken place from July 15 to August 15,high quality boll can be obtained and the aim for achiving early riping,high quality and yield cotton can be reached too.