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影响芦笋产量与品质的环境因素主要是生物为害和生理病害两方面。生理病害也就是由于各种栽培环境因素的不良影响,造成芦笋体内生理代谢的失调或破坏,从而在其生长发育过程中表现出种种不正常的症状。若能把握住这种症状的特点,就可以及时地采取有效措施来减轻危害。常见营养缺素症的主要表现形式: 1.缺氮;植株矮小,色泽淡黄。首先从下部老叶表现症状,逐渐向上,分枝顶端退绿,整株生长发育不良。 2.缺磷;植株矮小,拟叶皱缩,呈浓绿色,下部叶片变紫而脱落。茎细长;根系生
The environmental factors affecting the yield and quality of asparagus are mainly biological damage and physiological diseases. Physiological diseases is also due to the adverse effects of various cultivation environment factors, resulting in the physiological metabolism of asparagus body disorders or damage, which in the process of its growth and development showed a variety of abnormal symptoms. If we can grasp the characteristics of this symptom, we can take timely and effective measures to reduce the harm. The main manifestations of common nutrient deficiency syndrome: 1. Nitrogen deficiency; plant short, light yellow color. First, the performance of the symptoms from the lower part of the old leaves, gradually upward, the top of the branch back to green, the whole plant poor growth and development. 2. Phosphorus deficiency; plant dwarf, to be leaf shrinkage, was dark green, the lower part of the leaves turn purple and fall off. Stem slender; root students