Yield and nutrient effects of different straw returning methods under rice-wheat rotation in Jianghan Plain

doi:10.14088/j.cnki.issn0439-8114.2026.05.011

Abstract

Abstract: To clarify the effects of different straw returning methods on crop yield, nutrient uptake and soil fertility in the rice-wheat rotation region of Jianghan Plain, a field experiment was conducted in Hanchuan City, Hubei Province from November 2015 to October 2017, in which the first year was from November 2015 to October 2016 and the second year was from November 2016 to October 2017.Four treatments were set up, including no straw returning in both rice and wheat seasons（control）, rice straw returning, wheat straw returning and straw returning in both rice and wheat seasons, and the dynamic changes of crop yield, nitrogen, phosphorus and potassium uptake and soil nutrients were systematically measured. The results showed that in the second year, straw returning treatments increased rice yield, and among them, straw returning in both rice and wheat seasons had the most significant yield-increasing effect. In terms of nutrient uptake, compared with the control treatment, straw returning in both rice and wheat seasons in the second year significantly promoted the uptake of nitrogen, phosphorus and potassium by rice, while no significant difference was observed among treatments in the wheat season. In terms of soil pH and nutrients, the soil pH under straw returning treatments in the rice season of the second year was lower than that under the control treatment, and the contents of soil organic matter, total nitrogen, alkali-hydrolyzable nitrogen, available phosphorus and available potassium in all treatments in the rice season were higher than those in the wheat season. In the rice-wheat rotation system, both straw returning in both rice and wheat seasons and wheat straw returning in the second year effectively improved rice yield and nutrient use efficiency, and it was suggested that when promoting straw returning technology, rational combined application of nitrogen, phosphorus and potassium and water management measures should be integrated to further optimize the returning mode and achieve the synergistic improvement of high crop yield and soil fertility.

Key words: rice-wheat rotation, straw returning, yield, nutrient effect, Jianghan Plain

CLC Number:

S511
S512

ZHANG Yu-hao, ZHOU Jian-xiong, XIONG You-sheng, YUAN Jia-fu, XU Xiang-yu, LI Ji-fu, LIU Wei. Yield and nutrient effects of different straw returning methods under rice-wheat rotation in Jianghan Plain[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(5): 70-75.

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