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在两年的6个季节中调查了环境对血色苋(Amaranthus curentus)的三个品种,NHA_(C33),NHA_(C30)和NHA_(C100)的顶枯、茎枯和叶枯发生率的影响。具有重要意义的是第一季(4～6月)NHA_(C33)和NHA_(C30)的顶枯和茎枯的发生率最低,分别为0和8%;而第三季(12—2月)NHA_(C100)的叶枯率为4%,第三季三个品种的平均叶枯率均最低。相反,在这些品种上由瓜笄霉(Choanephora cucurbitarum(Berk & Rav.)Thaxt.引起的病害发生率在第二季(8—10月)则是最高的。血色苋种子的健康既受收获季节和环境条件的影响,也受品种的影响。第一季和第二季收获期间的降水、高湿和高温明显降低种子质量。可从NHA_(C100)和NHA_(C33)两个品种获得优质种子,且NHA_(C100)比NHA_(C33)更好。
The effects of environment on the incidence of top blight, stem blight and leaf blight of three varieties of Amaranthus cantonensis, NHA_ (C33), NHA_ (C30) and NHA_ (C100) were investigated in six seasons of two years . Significantly, the lowest incidences of top blight and stem blight of NHA_ (C33) and NHA_ (C30) in the first season (April-June) were 0 and 8%, respectively; whereas in the third season (December-February ) NHA_ (C100) leaf blight rate of 4%, the third quarter of three varieties of the lowest average leaf blight. On the contrary, the incidence of diseases caused by Choanephora cucurbitarum (Berk & Rav.) Thaxt. In these varieties was the highest in the second season (August-October). The health of the amaranth seeds was affected by both the harvest season And the impact of environmental conditions, but also affected by the variety.Seedling, high humidity and high temperature during harvest in the first and second seasons significantly reduced the seed quality.However, the quality seeds could be obtained from two varieties of NHA_ (C100) and NHA_ (C33) , And NHA_ (C100) is better than NHA_ (C33).