|Table of Contents|

Effects of Density on Root Growth and Yield of Spring Soybean Under Mulched Drip Irrigation(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2022年06期
Page:
679-687
Research Field:
Publishing date:

Info

Title:
Effects of Density on Root Growth and Yield of Spring Soybean Under Mulched Drip Irrigation
Author(s):
REN Jin-tao ZHANG Jia-xin BAI Pan-pan WANG Cong ZHANG Jian-xin
(College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China)
Keywords:
drip irrigation under mulch spring soybean roots yield
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2022.06.0679
Abstract:
In order to explore the effect of planting density on root growth and yield of spring soybean under mulched drip irrigation, we studied the effects of five field planting densities, 210, 270, 300, 330 and 360 thousand plants·ha-1 (D1-D5 treatments) on root dry matter, lateral root length, lateral root surface area and yield of Henong 71 in 0-20 cm, 20-40 cm, 40-60 cm, 60-80 cm and 80-100 cm soil layer under mulched drip irrigation. The results showed that, with the increase of density, the total root dry weight, total lateral root length and total lateral root surface area of each treatment increased before R5 stage, and increased firstly and then decreased after R5 stage. In different soil layers and at different times, the above root characteristics of D2 treatment was the highest, mainly due to the change of root characteristic parameters in 0-40 cm soil layer. The root characteristics of D2-D5 treatment in 40-80 cm soil layer were higher than those of D1 treatment. The total root dry weight, total lateral root length and total lateral root surface area of D2 treatment at R5 stage were larger than those of other treatments, which increased by 5.26%-26.95%,4.67%-34.60% and 8.34%-43.67%, respectively. Root dry weight and lateral root surface area at R6 stage were positively correlated with yield, R2 values were 0.890 and 0.834, respectively. The total pods and seeds number per unit area of D2 treatment were the highest, and the yield was 5 636.67 kg·ha-1, which increased by 9.02%-20.61% compared with other treatments. The results show that the appropriate sowing density of spring sowing planting under membrane drip irrigation for Henong 71 is 270 thousand plants·ha-1, and the suitable planting density can significantly promote the root growth of spring soybeans planted under membrane drip irrigation, increase lateral root length and lateral root surface area, thereby increase yield.

References:

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Last Update: 2022-11-29