论文部分内容阅读
通过连续3年大田定位试验,研究了陕北半干旱区不同沟垄覆膜集水模式下糜子边际效应和生理特性.试验设4种不同的沟垄宽度(带型),垄∶沟分别为40 cm∶40 cm(P40)、60 cm∶60 cm(P60)、80 cm∶80 cm(P80)、100 cm∶100 cm(P100),对照为露地平播(NM).结果表明:随着沟垄宽度的增大,糜子的产量边际效应指数和边际效应增大,边行的增产作用呈上升趋势,最大增产率达207.7%,而中行的增产作用呈下降趋势,增产幅度最低仅为10.3%.带型60 cm∶60 cm的糜子产量在3年中均为最高.同一处理内,边行对糜子产量的贡献率大于中行,差异达到显著水平.不同带型边行的叶绿素含量、Chl a/Chl b、光合速率均大于中行;沟垄宽度越大,边行的光合能力越强,中行的光合能力越弱.带型60 cm∶60 cm是陕北半干旱区糜子种植的适宜带型.
Through field experiment for 3 years in a row, the marginal effects and physiological characteristics of the mulching under different furrow-furrow irrigation patterns in semiarid areas of northern Shaanxi were studied. Four different furrow widths (P40), 60 cm: 60 cm (P60), 80 cm: 80 cm (P80), 100 cm: 100 cm With the increase of furrow width, the marginal effect index and marginal effect of yield increased, while the increase of yield increased by 207.7%, while the yield increase of Bank of China showed a downward trend with the minimum yield being only 10.3% % .The average yield of millet with 60 cm and 60 cm was the highest in three years.The contribution rate of side row to millet yield was higher than that of middle row in the same treatment.The difference was significant.The chlorophyll content, a / Chl b, the photosynthetic rate was higher than that of the middle line; the greater the widths of the furrows and furrows, the stronger the photosynthetic capacity of the borderline, the weaker the photosynthetic capacity of the bank. type.