红心李果实生长发育的数学模式

Mathematical Models for Development of Fruit of 'Hongxin' plums

红心李自3月底幼果发育至6月底成熟,总发育约85天,核及胚的发育分别为70天及42天。果实纵、横、厚三径及果实鲜重、干重、含水量,均可以分二个急速生长期和二个缓慢生长期,二者交替进行。急速生长期以水分增长为主,缓慢生长期以干物质积累为主。核及胚各有一个急速及缓慢生长期,前期核的纵横径急速生长而胚为生长缓慢,核硬化后纵横径增长缓慢,而胚重增长极快。以发育天数为x,果实纵、横、厚、鲜重、干重、水分、体积、核纵横径、胚鲜重、干重10项指标分别为y,分别得到直线、S形曲线及乘幂曲线方程。其相关系数均达极显著水平。这些方程可以用来预测果实及核、胚的发育状况。

Development of fruit in 'Hongxin' plums [P. Salicina Lindl. ] was studied in this paper. Theresults indicated that the fruit development began with the withering of flower at the end ofMarch and ended at the end of June when it matured. It meant that about 85 days was needed forits development. Development of stone and embryo continued for 70 and 42 days, respectively.Two rapid developing periods and 2 slow developing periods could be divided for the vertical andhorizontal diameters and thickness of fruit, weights of flesh and dried fruit, and the water contentof fruit. And The peziods took place by turn. The increase of the water content was the mainprocess in the rapid developing periods, but accumulation of dry materials in the slow developingperiods. There were a rapid developing period and a slow developing period for stone and embryodevelopment as well. The vertical and horizontal diameters of stone developed rapidly and embryoslowly in the early time, but after hardering of stone the case was just on the contrary. The daynumber of development was taken as x, 10 indices such as the vertical and horizontal diametersand thickness of fruit, weights of flesh and dried fruit, fruit volume, water content of fruit,vertical and horizontal diameters of stone, weights of flesh and dried embryo etc. was taken as y,and then equations of linearity, 'S' and power curves with extrem significant coefficients ofcorrelation could be obtained, respectively. These equations could be used for forecasting thedevloping states of fruit, stone and embryo.