Photosynthetic Characteristics, Fluorescence Characteristics And Chloroplast Ultrastructure Of Function Leaves Under Maize-peanut Intercropping

In time and space, reasonable intensive use of light, fertilizer, water and heat can improveenergy efficiency and productivity of land. So as to achieve the purpose of increasing production onper unit of land. With the population of world increased dramatic, the arable land have beendecreasing. The world’s growing demand for food is imperative. Intercropping affected moreattention by the agricultural producer. Peanut intercropping maize is a common form of planting inAfrica and Central Asia. It grown fast in Huang Huai Hai Plain. More studies found that the use oflight increased in the high position crop, and its yield advantage is obvious in intercropping. Westudy yield, peanut, Photosynthetic characteristics, fluorescence characteristics and chloroplastultrastructure of function leaves under maize intercropped with peanut at2:4. Study the adaptation ofboth crops with maize chemical regulation. Our objective was to reveal maize photosyntheticcharacteristics of enhancing the using high light ability and peanut photosynthetic characteristics ofenhancing the using weak light ability in maize‖peanut intercropping system. To prove it comefrom Light reactions or dark reactions. We make the study in2012-2013year at Henan University ofScience and Technology Farm. The results showed that:1. Compared with sole-cropped peanut, intercropping enhancing peanut using weak light abilitybut reducing peanut using high CO2ability. It suggested that intercropping enhancing peanut usingweak light ability was due to increase Fv/Fm, ΦPSⅡ and qP of photosystemⅡ, strengthen theability of light trapping and transformation, but not to increase CO2fixation and carboxylationability.2. Compared with sole-cropped maize, intercropping enhancing maize using high light and highCO2ability. It suggested that intercropping enhancing maize using high light ability was due toincrease of carboxylation efficiency and apparent quantum yield, and strengthening of the ability tofix CO2and carboxylation ability, but not to increase Fv/Fm, ΦPSⅡ and qP of photosystemⅡ,strengthen the ability of light trapping and transformation. 3. Light environment was different with maize chemical regulation, the adaptation mechanismof group is changed correspondingly.Peanut has better adaptation mechanism in using weak light with maize chemical regulation.The improvement of peanut leaf area index, absorption area, photosynthesisand dry matteraccumulation shows the reduction of light competitive disadvantage. The land equivalent ratio ofinter cropping was bigger, it displaying a significant intercropping yield advantage.Intercropping enhancing maize using high light ability was mainly due to increase of RuBPcarboxylation rate and electron transport rate. In improving the ability to use high concentrations ofCO2, the inter-cropped maize also improve the utilization of low CO2with chemical regulation.4. Chloroplast ultrastructure of intercropped maize is more complete and orderly. Butchloroplast ultrastructure of ntercropped peanut was destroyed. It was improve under maize withchemical regulation. Ultrastructure of peanut function leaves was improved somewhat withmaize chemical regulation.