Shi Jian-guo, Zhu Kun-lun, Cao Hui-ying, Dong Shu-ting, Liu Peng, Zhao Bin, Zhang Ji-wang
Ying Yong Sheng Tai Xue Bao. 2015 Jan;26(1):46-52.
Using Denghai 605 (DH4605) as the experimental material, shading (S) and increasing light (L) treatments from flowering to maturity stage were designed in a field experiment to explore effects of light on dry matter accumulation and nutrient absorption of summer maize. Results showed that grain yield, dry matter accumulation and nutrient absorption decreased significantly after shading but increased after increasing light. Yields in S treatment from 2011 to 2013 were reduced by 59.4%, 79.0% and 60.6% compared to those in CK, while that in L treatment were increased by 16.3%, 12.9% and 6.8%, respectively. The relative N and P absorption increased to a certain extent because of the greater effect of shading on dry matter accumulation than that of N and P absorption. After shading, K absorption of whole plant corn decreased significantly to a greater extent than that of dry matter accumulation decrease. The proportion of nutrient allocated to grains decreased significantly after shading. Dry matter accumulation and N and P absorption rates increased significantly after increasing light, and effects of increasing light on N and P absorption were greater than that of dry matter accumulation. Nutrient accumulation and the proportion allocated to grain increased significantly after increasing light.
以登海605（DH4605）为试验材料，在田间试验中设计了从开花期到成熟期的遮光（S）和增光（L）处理，以探究光照对夏玉米干物质积累和养分吸收的影响。结果表明，遮光后籽粒产量、干物质积累和养分吸收显著降低，而增光后则增加。2011 - 2013年S处理的产量与对照相比分别降低了59.4%、79.0%和60.6%，而L处理的产量分别增加了16.3%、12.9%和6.8%。由于遮光对干物质积累的影响大于对氮、磷吸收的影响，相对氮、磷吸收有一定程度增加。遮光后，全株玉米钾吸收量下降幅度明显大于干物质积累量下降幅度。遮光后养分分配到籽粒中的比例显著降低。增光后干物质积累以及氮、磷吸收速率显著增加，且增光对氮、磷吸收的影响大于对干物质积累的影响。增光后养分积累以及分配到籽粒中的比例显著增加。
