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花期的澳洲坚果植株经不同强度水分胁迫处理后 ,植株的花粉育性、SOD和POD活性、座果率以及叶绿素含量、总糖含量和淀粉含量等光合产物与对照之间存在显著性差异。在水分胁迫条件下 ,处理间的花粉育性、SOD和POD活性、座果率及光合产物随水分胁迫强度的加剧而下降 ,处于过饱和灌溉的处理也表现为下降。这是由于水分胁迫导致酶活性降低、光合产物减少、花粉萌发率低、花粉管生长速度慢 ,造成花期不遇、授粉受精不良、座果率低 ,最后造成产量降低的缘故。正常灌溉的“处理N” ,植株的综合效应达到最佳。该试验的 3个澳洲坚果品种的耐旱性是Kau >Pahala >O .C .。花期干旱季节进行 6 0 %田间持水量灌溉有利于澳洲坚果的授粉受精 ,提高座果率及产量
There was a significant difference between the photosynthetic products of the macadamia macrophylla and the control at the florescence of macadamia nut under different water stress treatments, such as pollen fertility, SOD and POD activity, fruit set rate, chlorophyll content, total sugar content and starch content. Under water stress conditions, the pollen fertility, SOD and POD activities, fruit set rate and photosynthetic products decreased with the increase of water stress intensity, and the treatment in supersaturated irrigation also decreased. This is due to water stress leading to reduced enzyme activity, reduced photosynthetic products, pollen germination rate is low, pollen tube growth is slow, resulting in flowering season, poor pollination fertilization, fruit set rate is low, resulting in lower production. Normal irrigation “treatment N”, the comprehensive effect of plants to achieve the best. The drought resistance of the three macadamia varieties tested in this experiment is Kau> Pahala> O .C. Flowering 60% field irrigation during florescence is conducive to the pollination and fertilization of Macadamia nut, and to improve the fruit yield and yield