Increased seedlings per hill compensates yield loss due to zero tillage in machine-transplanted fragrant rice
文献类型： 外文期刊
作者： He, Longxin 1 ; Ashraf, Umair 3 ; Du, Bin 1 ; Lai, Rifang 1 ; Luo, Haowen 1 ; Abrar, Muhammad 4 ; Tang, Xiangru 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, Dept Crop Sci & Technol, Guangzhou 510642, Peoples R China
2.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Peoples R China
3.Univ Educ, Dept Bot, Div Sci & Technol, Lahore 54770, Punjab, Pakistan
4.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China
期刊名称：CROP SCIENCE （ 影响因子：2.319； 五年影响因子：2.631 ）
ISSN： 0011-183X
年卷期： 2020 年 60 卷 5 期
页码：
收录情况： SCI
摘要： Zero tillage is a soil conservation technique. However, reduction in grain yield might be caused without the effects caused by tillage at the beginning of planting. Present study was conducted in order to test the hypothesis that increased seedlings number per hill could compensate for yield decrement under zero tillage. A two-year field experiment was conducted between 2018 and 2019 with two fragrant rice cultivars and three treatments: convention tillage with normal seedlings number per hill (CTNS); zero tillage with normal seedlings number per hill (ZTNS) and zero tillage with high seedlings number per hill (ZTHS). The results showed that lower leaf area index, dry matter accumulation, accumulation of nitrogen, phosphorus and potassium were observed in ZTNS treatment than CTNS treatment. Compared with CTNS treatment, ZTNS treatment significantly decreased the grain yield by 11.80-26.65%. However, the differences between ZTHS and CTNS for yield attributes (effective panicle number, grain number per panicle, seed-setting rate and 1000-grain weight) and grain yield were generally small during both seasons and at both sites for both cultivars. Therefore, our study indicates that increasing seedlings number per hill could be an effective strategy to compensate the potential negative effects on yield formation and grain yield of fragrant rice under zero tillage.
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