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Tillage practices improve rice yield and soil phosphorus fractions in two typical paddy soils

文献类型： 外文期刊

作者： Ahmed, Waqas 1 ; Qaswar, Muhammad 1 ; Jing, Huang 1 ; Wenjun, Dong 3 ; Geng, Sun 4 ; Kailou, Liu 5 ; Ying, Meng 3 ; Ao, T 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Observat Stn Qiyang Agriecol Syst, Qiyang 426182, Hunan, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Tillage, Haerbin 150000, Peoples R China

4.Hunan Inst Soil & Fertilizer, Changsha 410125, Hunan, Peoples R China

5.Jiangxi Inst Red Soil, Natl Engn & Technol Res Ctr Red Soil Improvement, Nanchang 331717, Jiangxi, Peoples R China

6.Xinjiang Acad Agr Sci, Inst Soil Fertilizer & Agr Water Conservat, Urumqi 830091, Peoples R China

7.Gulistan State Univ, Dept Soil Sci, Gulistan City 120100, Uzbekistan

8.Guangzhou Univ, Sch Environm Sci & Engn, Guangdong Prov Key Lab Radionuclides Pollut Contr, Guangzhou 510006, Guangdong, Peoples R China

关键词： Paddy soils; Phosphatase activities; Phosphorous fractions; Rice grain yield; Tillage systems

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.308； 五年影响因子：3.586 ）

ISSN： 1439-0108

年卷期：

页码：

收录情况： SCI

摘要： Purpose This research was undertaken (I) to evaluate the status of phosphorus fractions in paddy soils in response to different tillage management practices under different rice-based cropping systems and environments in order to better understand phosphorus behavior in paddy soils and (II) to assess the effects of various tillage practices on crop yield in different soil types and climatic conditions. Materials and methods We selected four tillage treatments, i.e., conventional tillage (T1), conventional tillage with straw return (T2), rotary tillage with straw return (T3), and no-tillage with straw return and autumn plowing with straw return (T4) at Ningxiang and Haerbin, respectively. Soil samples were collected from 20 cm depth, and we investigated soil pH, total P, Olsen P, SOM content, phosphatase activities, phosphorus fractions, and grain yield at the two experimental sites. Results and discussion The results showed that the T4 tillage system led to significantly higher soil organic matter (SOM) content, total P, and Olsen P concentrations at both sites compared with T1. Regardless of the tillage system, the average rice grain yield at Haerbin was 50.3% greater than that at Ningxiang. Phosphomonoesterase (AcP) and phosphodiesterase (DP) enzyme activities were significantly higher, by 39.8% and 62.1% and by 40.3% and 54.6%, under T4 compared to under T1 at Haerbin and Ningxiang, respectively. The organic and inorganic fractions of P were significantly affected by the different tillage systems. Labile and moderately labile P pools were 29.3% and 19.2% higher in Ningxiang and 64.7% and 33.8% higher in Haerbin under T4 compared to T1, and the non-labile P pools were 10.6% and 18.5% lower, respectively. The labile and moderately labile organic P fractions and phosphatase activities showed a significant correlation with SOM and total P concentrations in RDA analysis. Variance partitioning analysis (VPA) showed that different soil properties, climate factors, phosphatase activities, and their interactions were responsible for 7.1%, 6.8%, 1.3%, and 53.7%, respectively, of the variation in grain yield. Conclusions Different tillage management practices revealed varied effects at both sites for grain yield, P fractions, and phosphatase activities. Tillage management and climatic variations could be the driving factors that influence grain yield in northern and southern parts of China.

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