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1.本试验用水液培养中农28小麦,于不同发育时期变更溶液浓度,观察植物的反应,旨在论证我们以前在盆栽试验中所获得的结果。2.出节期至抽穗期提高溶液浓度,极有利于花器官的分化,麦穗结实率显著增加。这一处理的植物表现了高的收获量(等于对照的140%)和好的收获结构。因此,提高这一时期的营养水平效果最大。3.分蘖期至出节期提高溶液浓度,虽可以增加结实率,但未能提高产量,因为它的千粒重低。4.苗期至分蘖期栽培在1/8N的麦株,发育延迟,地上部及根系的生长均较短小,初期分蘖数少,有效分蘖率低,小穗数及一穗粒数均少。产量远远落后于对照(33.5%)。5.苗期至分蘖期栽培在1/4N的麦株,一般生长受到轻微抑制,但收获量及收获结构尚能接近于对照的水平。6.小麦分蘖期前后不可以缺乏养料,但也不需要过多的养料,这一时期的适当的营养,为后来正常的营养生长和生殖生长所必需。提高出节期的营养效果最大。
1. In this experiment, Zhongnong 28 wheat was cultivated with water and fluid, and the solution concentration was changed at different developmental stages to observe the response of plants. The purpose of this experiment is to demonstrate the results we obtained in pot experiments. 2. From the beginning of the season to the heading stage to increase the concentration of the solution, it is very conducive to the differentiation of floral organs, ear seed setting rate increased significantly. This treated plant showed high yield (equivalent to 140% of control) and good harvest structure. Therefore, improving the nutritional level during this period is most effective. 3. Increasing the concentration of the solution from tillering stage to the beginning of the festival can increase the seed setting rate but fail to increase the yield due to its low grain weight. Seedling to tillering stage of wheat plants grown in 1 / 8N, growth delay, shoot and root growth are shorter, the initial number of tillers, effective tillering rate, spikelets and grains per spike were few. The yield lags far behind the control (33.5%). The seedling to tillering stage of wheat cultivated in 1 / 4N, the general growth was slightly inhibited, but the harvest and harvest structure can still close to the control level. Wheat tillering period before and after the lack of nourishment, but also do not need too much nourishment, the proper nutrition of this period, the subsequent normal vegetative and reproductive growth necessary. To improve the nutrition effect of the greatest holiday.