盐粳2号产量结构特点 盐粳2号属迟熟中粳,在我县种植时一生有16～17叶、5～6个伸长节间,具有高产稳产、熟期适宜和米质好等优点。盐粳2号的高产结构有其本身的特点,据1984和1985两年对208块田的考查,每亩穗数分别为28.46和26.24万,每穗总粒数分别为85.7和94.3粒,变幅较大;而结实率分别为91.92％和91.90％,千粒重两年均为23.8克,都比较稳定,可见穗数和每穗总粒数是影响盐粳2号产量的主要因素。因此,我们可以用每亩总颖花量或每亩总实粒数近似地代表产量水平来分析其产量结构(表1)。由表1可以看出大面积生产上穗数以每亩26～30万 Yanjing No.2 Yield Structure Characteristics Salt japonica No.2 is late maturing japonica rice. In our county, there are 16 ~ 17 leaves and 5 ~ 6 elongate internodes in my plantation, with high and stable yield, suitable maturity and good quality of rice advantage. The high yield structure of Yanjing 2 has its own characteristics. According to the test of 208 fields in 1984 and 1985, the number of panicle per acre was 28.46 and 26.24, respectively, and the total number of grains per panicle was 85.7 and 94.3, respectively While the seed setting rate was 91.92% and 91.90% respectively. The grain weight was 23.8 g for both years, which were relatively stable. The number of panicles per spike and the number of total grains per panicle were the main factors affecting the yield of Yanjing 2. Therefore, we can analyze the yield structure using the total amount of spike per acre or the total number of grains per acre (Table 1). It can be seen from Table 1 that the spike number of large-area production is 26-30,000 per acre