Paecilomyces variotii Extracts and Controlled-Release Urea Synergistically Increased Nitrogen Use Efficiency and Rice Yield

被引:24
|
作者
Wang, Xiaoqi [1 ,3 ]
Yao, Yuanyuan [1 ]
Chen, Baocheng [1 ]
Zhang, Min [1 ,2 ]
Liu, Zhiguang [1 ]
Wang, Qingbin [1 ,4 ]
Ma, Jinzhao [5 ]
机构
[1] Shandong Agr Univ, Coll Recourses & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China
[2] Kingenta Ecol Engn Grp Co Ltd, State Key Lab Nutr Resources Integrated Utilizat, Linyi 276700, Shandong, Peoples R China
[3] Shandong Agr Univ, Coll Hort Sci & Engn, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China
[4] Pengbo Biol Technol Co Ltd, Tai An 271018, Shandong, Peoples R China
[5] Binzhou Univ, Shandong Prov Key Lab Ecoenvironm Sci Yellow Rive, Binzhou 256603, Peoples R China
来源
ACS OMEGA | 2020年 / 5卷 / 22期
基金
中国国家自然科学基金;
关键词
PLANT BIOSTIMULANTS; CROP YIELDS; HUMIC SUBSTANCES; MANAGEMENT; FERTILIZERS; RESPONSES; NITRATE; SYSTEM; CHINA; ACIDS;
D O I
10.1021/acsomega.0c01348
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A novel biostimulant, Paecilomyces variotii extracts (ZNC), with the ability to promote N absorption in the plant at a very low level has been proved in the lab experiment, but its chemical composition and practical effect in the field remain unclear. In this work, we determined the molecular composition of ZNC. Then, a three-year field experiment was conducted to investigate the synergistic effects of controlled-release urea (CRU) without ZNC or with ZNC at three doses (87.5, 175, and 262.5 mL ha(-1)) on the yield, nitrogen use efficiency (NUE), and net returns of rice. Results indicated that ZNC contained more carbohydrates, amino acids, alkyl structures, and less aromatic structures with a molecular weight between 140 and 2507 Da. Rice yield was 6.9-21.0% higher with CRU than with conventional urea. Combining CRU with ZNC at a dose of 87.5 mL ha(-1) performed the best and significantly increased rice yields by 8.7-12.1%, NUE by 15.0-20.2%, and average net returns by 10.9-15.4% during three rice-growing seasons compared to the application of CRU only, which is attributed to the positively increasing panicles and N uptake of rice. With the increased dose of ZNC, the yield of rice showed a decreasing trend, but the yield was still higher/not significant than the CFF treatment without ZNC. Therefore, the planting patterns with the combination of CRU and biostimulant are an efficient way to increase the rice grain yield and net returns.
引用
收藏
页码:13303 / 13311
页数:9
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