水肥耦合对燕麦光合特性和产量的影响

Influence of Photosynthetic Characteristics and Yield in Oats on Coupling of Fertilizer and Irrigation

为明确旱作地区水肥条件和燕麦生产的关系,采用裂区试验设计研究了不同水分磷肥处理组合对燕麦光合特性和水分利用效率以及产量变化的影响。结果表明:水分处理间叶绿素含量在拔节期差异显著,肥料梯度间各时期差异显著。植株水分利用效率(WUE)随水分梯度的变化显著,随肥料梯度的变化不显著,净光合速率随水分梯度升高而增加。蒸腾速率随水分梯度的升高而升高,W2P2处理的WUE最大,W2P1的其次。丰雨季节增施磷肥对燕麦植株光合效率的提高作用显著。WUE以水处理2优点最为突出,磷肥低水平的WUE高于高水平处理。不同处理差异显著,生物产量W1P3,W2P4,W3P4处理产量最高,W3P4处理产量较W2P4提高5%,较W1P4提高29%。籽粒产量W1P2,W2P2,W3P2处理产量最高,W3P2处理产量较W2P2的提高6%,较W1P2提高51.8%。生物产量与籽粒产量的最大值分别在水分处理3,施磷肥90 kg/hm2和30 kg/hm2处出现。

In order to identify the relationship of Fertilizer and Irrigation on oat production in dry area.adopt the split-plot design,Study of different treatment combinations of water and phosphorus to photosynthetic characteristics of oats and water use efficiency and the impact of changes in field.The results showed that;water chlorophyll content among treatments significant differences in the jointing stage,the rest period is not obvious,the time difference between the gradient of fertilizer significantly.Plant WUE significantly with the moisture gradient,the gradient did not change significantly with the fertilizer,the net photosynthetic rate increased with the increase of moisture gradient.Transpiration rate increased with the increase of moisture gradient increased,W2P2 handle the largest WUE,W2P1 the second.Feng Yu season phosphorus fertilizer on growth of oat plants on the role of photosynthetic efficiency significantly.WUE benefits to water two most prominent low-level WUE than high P treatment.Significant difference between different treatments,biomass W1P3,W2P4,W3P4 deal with the highest yield,W3P4 W2P4 The yield increased 5% more than W1P4 by 29%.Grain yield W1P2,W2P2,W3P2 handling the highest yield,W3P2 W2P2 The yield increased 6% more than W1P2 51.8% increase.Biological and grain yield at the maximum of three water treatments,P fertilizer 90 kg/ha and 30 kg/ha department appears.