推广耐密型品种 为玉米合理施肥提出的新课题

SPREAD HIGH DENSITY TYPE HYBRIDS PUT A NEW QUESTIONS FOR APPLYING FERTILIZER RATIONALLY AT CORN

本文以掖单号品种为例,论述了耐密型玉米品种的需肥特点;个体与群体的矛盾规律;光合势与光合生产率的关系;密植对土壤养分环境的压力,造成多因子、多梯度的养分限制因子;果穗尖端部位子粒对产量影响的增大及抗灾能力的相对减弱等特点,应针对性地采取相应的施肥技术措施,充分发挥优良品种增产潜力。

The article discusses characteristics of fertilization for high density type of corn by brids, contratictory regular between individuality and population, relation between photosynthetic power and NAR. The high density planting affecting soil nutrinent environment causes nutrinent limitation from many factors and many stairs. The close planting increase impact on seeds of fruit pointed end, and weaken ability of fight natural calamities of corn. etc, Therefore the correspondent applying fertilizer measures should be used for having a definite objectin view, so that the latent capacity of increasing production of good corn varieties would be given full play.