水保所知识产出(1956---)知识库

为探明微润灌溉对番茄生长和土壤水分的影响，设置了3 种不同埋深和2 种不同工作压力，研究了微
润带埋设深度和压力对番茄生长、产量及水分利用效率的影响。结果表明: 定植后94 天，微润带压力水头为180
cm、埋深为15 cm 时的番茄株高分别比埋深10 cm 和20 cm 的处理增加9． 17%和7． 55%; 此时番茄气孔导度最小，
光合速率和水分利用效率最大，分别比埋深为10 cm 和20 cm 的处理增产3． 24% 和7． 45%; 不同埋深土壤含水率
垂直分布随时间的变化存在差异，15 cm 埋深时的土壤含水率最大。微润带埋深是影响土壤水分时空变化的主要
因素; 压力对土壤含水量时间变化影响不显著。

In order to verify the effects of moistube-irrigation on the growth of tomato and water condition of
soil，three different buried depths and two different pressure heads were designed． In addition，the resulting the
effects were further analyzed on the growth and yield of tomato and water use efficiency． The results showed that after
94 days of planting，the buried depth at 15 cm had the highest plants which were increased by 9． 17% and 7．
55% from the buried depths at 10 cm and 20 cm，respectively． At this time，tomatoes had the minimal stomata
conductance and highest photosynthetic rate and WUE within all of the four treatments employed in this investigation，
resulting in yield increases of 3． 24% and 7． 45% more at buried depth at 15cm than those at buried depths at
10 cm and 20 cm，respectively． The temporal variations of soil water content along vertical distribution were different
under different buried depths，with the buried depth at 15 cm the highest． The buried depth of moistube was
the main factor influencing the temporal variations of soil water content． However，the effects of temporal variations
of soil water content under different pressures were secondary．