| Cite this article: | 杨胜举,佟玲.玉米冠层光分布、衰老特征及产量对密度和水分的响应研究[J].灌溉排水学报,0,():-. |
| Yang Shengju,Tong Ling.玉米冠层光分布、衰老特征及产量对密度和水分的响应研究[J].灌溉排水学报,0,():-. |
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| Study on the Canopy Light Distribution, Aging Characteristics and Yield of Maize Response to Different Density and Moisture |
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Yang Shengju, Tong Ling
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China Agricultural University
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| Abstract: |
| Abstract: 【Background】Planting density and soil moisture conditions are important to the formation of maize growth and yield. 【Objective】In order to explore the corn canopy light distribution, aging characteristics and yield response to the density and moisture conditions. 【Method】A commonly planted species (Xianyu 335) was chosen to test in this region, there were 6 treatments in total from the combination of two planting densities of 70000 plants/hm2 and 90000 plants/hm2 (referred as D1 and D2, respectively) and three irrigation levels of full, mild and moderate deficit irrigation (referred asW1,W2 and W3, respectively), each treatment has three replicates. The change of leaf area index, chlorophyll content, radiation interception rate, dry biomass accumulation rate and yield were observed in different growth stages. 【Result】Chlorophyll content is significantly affected by water, and decreases with the decrease of irrigation water, but the effect of density is not significant; D2 density has a larger LAI than D1 density, which can significantly increase the radiation interception rate of the corn population, improve the light energy utilization of the population, and increase The dry matter accumulation of the population promotes the increase of RUE. Under the two densities, the yield decreased with the decrease of irrigation amount, but the reduction rate was D2W3>W1 at the same planting density. The harvest index showed a different rules under different densities, and D1W2 and D2W3 had the highest value than other treatments. 【Conclusion】A moderate increase in planting density is conducive to constructing a reasonable and efficient photosynthetic population structure and increasing the dry matter accumulation, yield and WUE of the corn population. Moderate deficit irrigation can effectively improve water use efficiency without significantly reducing production. Therefore, a moderate increase in density and water deficit has important guiding significance for saving water and increasing production in arid areas. |
| Key words: Planting density; Water deficit; Canopy light structure; production |
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