Planting pattern and pre-sowing soil moisture effect on yield of soybean
Legume Research An International Journal
This study aimed to investigate the effects of planting patterns and pre-sowing soil moisture on the yield of summer soybean [Glycine max (L.) Merr.] in northern China from 2009 to 2010. The experiment comprised three planting patterns, namely, 30 cm uniform row spacing pattern (U), "20 + 40" wide-narrow row planting pattern (WN), and "20 + 40" furrow planting pattern (F). Three pre-sowing soil moisture treatments were performed at 90, 135, and 180 mm and involved irrigation during the winter
... during the winter wheat growth season. The leaf area index and chlorophyll content index of F were higher than those of U and WN under the same pre-sowing soil moisture treatment (P < 0.05). The accumulation of dry matter and the grain yield of F were significantly higher than those of U and WN (P < 0.05) irrespective of water content. The increase in grain yields of summer soybean was significant in 2009 (P < 0.05) but not in 2010 (P > 0.05) for 135 and 180 mm pre-sowing soil moisture under F. In conclusion, F and 180 mm pre-sowing soil moisture treatments were good agronomic measures to increase the yield of summer soybean in northern China.