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应用微机分析了上海郊区1981—1983年后季稻高产试验田的产量与产量构成因子的关系,并用通径分析法计算了每亩穗数、每穗实粒数和千粒重对产量的各自作用。结果表明高产后季稻产量结构三因子与产量有着极显著的正复相关关系(R=0.8356~(**)),可用多元回归式表示如下: y=-705.77+17.21X_1+9.29X_2+17.93X_3每亩穗数、每穗实粒数和干粒重对产量的直接作用(直接通径系数)分别为0.8426、1.3577和0.5250,实粒数>穗数>粒重。其中每穗实粒数对产量的净作用达0.5491。据此,高产后季稻的产量构成应以增加粒数为主。亩产800斤以上的产量构成指标,以每亩28—32万穗、每穗55—60粒、千粒重26克左右为宜。并提出促进个体,协调群体,提高单株生产力的栽培方法,是达到上述指标,获取后季稻高产的有效途径。
The relationship between yield and yield components of high-yielding trial cropland of quaternary rice in Shanghai suburb after 1981-1983 was analyzed by computer, and the respective effects of grain yield per acre, grain number per spike and grain weight per ear were calculated by the path analysis method. The results showed that there was a significant positive correlation (r = 0.8356 ~ (**)) between the three factors and the yield of high yield postharvest rice yield structure, which can be expressed as multivariate regression equation as follows: y = -705.77 + 17.21X_1 +9.29X_2 + 17.93 The direct effect (direct path coefficient) per spike of panicles per panicle, dry kernel weight per panicle and dry kernel weight on yield were 0.8426, 1.3577 and 0.5250, respectively, and the number of true grains> spikes> grain weight. The net effect of grain yield per panicle was 0.5491. Accordingly, the production of high-yielding rice should be based on the increase in grain size. Yield per mu yield of more than 800 pounds constitute indicators to 28-32 million spike per acre, 55-60 grains per spike, grain weight of about 26 grams is appropriate. And put forward to promote the individual, coordinate groups and improve the productivity of individual cultivation methods, is to achieve the above indicators, access to high yield after the quarter of an effective way.