【摘要】 在新疆石河子地区,在滴灌、种植密度和田间配置方式相同的条件下,比较了春播与复播油葵品种新葵20号产量形成及群体生理参数。结果表明,春播条件下,生育期、生物产量、籽实产量、收获指数分别为97d、9 271.9kg/hm2、4 349.0kg/hm2、0.47,复播条件下则分别为94d、14 413.5kg/hm2、41 06.4kg/hm2、0.35。春播和复播的最大叶面积指数(LAImax)分别为4.54和5.52。每公顷春播的光合势(LAD)为93.25m2·d,开花后占77.6%;复播则为94.12m2·d,开花后占82.9%。春、复播全生育期平均净同化率(NAR)分别为3.67、5.26g/(m2·d)。采用更早熟的品种,提早播种,使灌浆提前,加之使用植物生长调节剂以增强光合产物向籽实转移,有望进一步提高复播油葵产量。更多还原

【Abstract】 Field experiment was carried out to comparative study yield formation and canopy physiological parameter of oil- sunflower hybrid Xinkui20 population between spring sowing and stubble- field. The results showed that: the growth period of spring sowing sunflowers was 97d,and biological yield,seed yield and harvest index were 9 271. 9,4 349. 0kg / hm2and 47% respectively. Correspondingly,sunflowers in stubble- field were 94d, 14 413. 5,4 106. 4 kg / hm2and 34. 7% respectively. LAImaxof sunflower in spring sowing and in stubble- field were 4. 54 and 5. 52 respectively LAD. Per hectare of spring sowing sunflower was 93. 25m2·d,and after flowering was 77. 6%; LAD per hectare of sunflowers in stubble- field was 94. 12m2·d,and after flowering was 82. 9%; Average of NAR during whole growth days of spring sowing sunflower and sunflowers in stubble- field respectively were 3. 67,5. 26g / m2·d. Using early- maturing variety and earlier sowing date,the grain- filling stage could be earlier. In the meantime,applying plant growth regulator,could transfer photosynthesis product to seeds more efficiently and improve yield in stubble- field.更多还原