【摘要】 大田条件下,研究了产量为9225kg/hm2高产花生群体特征,结果为:(1)花生LAI符合y=0.2354-0.0489x+0.003x2-0.00002x3。LAI峰值出现在7月下旬～8月上旬,峰值期LAI在5以上。3以上LAI维持60d,4以上LAI维持40d。(2)全生育期LAD为331.7m2/d/m2,其中产量形成期LAD为263.5m2/d/m2,占全生育期的79.4%。(3)LIR在幼苗期一般不超过50%。结荚期前后是光截获的高峰期,LIR在90%以上。(4)群体和荚果干物质积累符合Logistic方程,y群体=1600/(1+247.8937e-0.0857x),y荚果=920/(1+456343.0006e-0.1545x);群体干物质积累高峰出现在出苗后64d,最高速率为35.5g/m2/d,荚果干物质积累高峰出现在出苗后84d,最高速率为35.5g/m2/d。更多还原

【Abstract】 Field Studies on the canopy characters of highyielding peanut of 9,225 kg/ha showed: (1) The leaf area index (LAI) of peanut fitted the equation of y=0.2354-0.0489x+0.003x2-0.00002x3. The peak value (LAI >5) appeared from late July to early August. The period of LAI>3 lasted for 60 d and that>4 lasted for 40 d. (2) The leaf area duration (LAD) for whole growing season was 331.7 m2/d/m2, and for yield forming period was 263.5 m2/d/m2 , contributing 79.4% of the total. (3) Leaf interception rate (LIR) usually less than 50% during the seedling stage and the peak of LIR (>90%) appeared around pod setting stage. (4) The accumulating dynamics of the total dry matter and pod yield fitted the logistic equation: ytotal=1600/(1+247.8937e-0.0857x), ypod=920/(1+456343.0006e-0.1545x). The accumulating peak of the total dry matter (35.5 g/m2/d) appeared on 64 d after seed emergence and that of the pod (35.5 g/m2/d) appeared on 84 d after the seed emergence.更多还原