不同水肥条件对春玉米光合运转关系的影响及其产量效应的研究

以两种土壤水分和４种土壤肥力水平对春玉米光合运转关系的影响及其产量效应进行了较深入的探讨。在土壤水分适宜条件下，不同土壤肥力春玉米叶片光合速率随肥力水平的提高而增加的主要原因是气孔因素的限制，光合速率与籽粒产量呈现极显著正相关关系。

STUDY ON THE EFFECT OF DIFFERENT SOIL WATER CONTENTAND SOIL FERTILITY CONDITIONS ON THE.PHOTOSYNIHETICCONDVCTANCE AND YIELD OF SPRING CORN

This paper more deeply discusses the effect of different soil water content and soilfertility treatment on the photosynthetic conductance and seed yields of spring corn:The experiment is conducted with two soil water content treatments and four soil fertility treatments. Under the moderate soil water condition the photosynthetic rate of springcorn increases with the increase of soil fertility the main causes is the limit on of stomatal factor. The photosynthetic rate and seed yield appear an extremely significant positive correlation. In the moderately soil water deficits,the stomatal conductance, photosyntheticrate and stomatal resisting figare of spring corn decreases but the CO2 concentration in the lute cellular space considerably increases and the droppment of photosynthetic activity of mesophyll all leads to the decrease of photosynthetic rate.