| Related studies showed that the photosynthetic rat
e could be used to simulate the economic output of crops. In order to select hig
hly efficient and suitable planting mode of cotton in intercropping with jujube
in south Xinjiang, the experiment was conducted with different row spacing and d
ifferent irrigation quota for cotton in jujube/cotton intercropping system. The
net photosynthetic rate (Pn) of cotton leaves under different light and ther
mal environments was analyzed, and other related physiological parameters were a
lso measured, so as to compare them with each other by drawing broken line figur
es. The results showed that, under the treatments of M3 (6 rows of cotton in eac
h strip, and 0.5 m of spacing between jujube and cotton) and W3 (irrigation
quot
a: 350 m3·667m-2), the Pn of cotton was most similar to that of sol
e cropping cotton; under the combined treatment of M3W3, the average Pn of
cotton was the largest, and the yield was the highest. Therefore, Pn can be
used for predicting the economic yield of cotton and for selecting the planting
mode of cotton in jujube/cotton intercropping system. |