Effects of Rice Straw Returned to the Fields by Water Harrow in Autumn on Soil and Rice Characters
Received date: 2022-12-31
Online published: 2023-07-26
The effects of different rice straw returning methods on rice straw decomposition, soil properties, weed occurrence and rice properties were studied with rice varieties Jihong 9 and Jinongda 853. The results showed that the total CH4 emission of rice straw returning to field in autumn was about 1/2 of that of straw returning to field in spring, the weight loss rate of straw was 7.1% higher than that of straw returning to field in spring, and the breaking force of straw was 83.8% of that of straw returning to field in spring. After the straw was returned to the field in autumn for two consecutive years, the content of soil organic matter increased by 6.1 g/kg, and the content of available phosphorus also increased significantly. Compared with rice straw returning to field in spring, the effect of fertility cultivation of rice straw returning to field in autumn was more significant. Compared with the treatment without straw returning to the field, the number of gramineous weeds in the treatment of straw returning to the field in autumn decreased significantly after transplanting, the rice yield increased by 4.9%.
HE Bing, LI Chao, YAN Yongfeng, LIU Yueyue, HE Jingqi, YU Tianhua, WANG Shuai, CHEN Dianyuan, YAN Guangbin . Effects of Rice Straw Returned to the Fields by Water Harrow in Autumn on Soil and Rice Characters[J]. China Rice, 2023 , 29(4) : 66 -71 . DOI: 10.3969/j.issn.1006-8082.2023.04.012
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