Acta Agriculturae Boreali-Sinica ›› 2022, Vol. 37 ›› Issue (1): 58-67. doi: 10.7668/hbnxb.20192538

Special Issue: Wheat Rice Hot Article

• Tillage & Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Tillage Methods on Growth and Physiology of Seedlings Stem and Tillers and Their Productivity of Wheat in Rice Stubble

LI Fujian, XU Dongyi, LIU Kaili, ZHU Min, LI Chunyan, ZHU Xinkai, DING Jinfeng, GUO Wenshan   

  1. Jiangsu Key Laboratory of Crop Genetics and Physiology,Co-Innovation Center for Modern Production Technology of Grain Crops,Wheat Research Institute,Yangzhou University,Yangzhou 225009,China
  • Received:2021-07-27 Published:2022-02-28

Abstract:

To investigate the cultivation approach achieving robust seedlings and high yields of wheat in rice stubble,the effects of three tillage methods,including plow tillage followed by rotary tillage(PR),rotary tillage twice(RR),and no-tillage(NT),on the growth and physiology of main stem and tillers of wheat seedlings and their single spike yield at maturity were studied under the conditions of rice straw retaining with full amount.The results showed that PR increased the stems number per plant at the beginning of over-wintering by 1.5%,12.8%,respectively,compared with RR and NT,with significant differences(P<0.05).Leaf area and dry matter weight per plant under PR were 94 cm2 and 787 mg,respectively,which were significantly higher than those under NT(P<0.05).Compared with NT,PR significantly improved activities of nitrate reductase(NR),glutamine synthase(GS),and glutamate synthase(GOGAT)of the top full expanding leaves in the main stem and the first,second,and third tillers(P<0.05).PR also significantly promoted the activities of diphosphate carboxylase(Rubisco),pyruvate phosphate dikinase(PPDK),triosephosphate isomerase(TPI),sucrose synthase(SS-Ⅱ),and sucrose phosphate synthase(SPS),and enhanced SPAD and soluble sugar content(P<0.05).And compared with NT,PR significantly increased the nitrogen content in seedling leaves of main stem,second and third tillers(P<0.05).Moreover,PR and RR increased leaf area and dry matter weight of the main stem and the first and second tillers.Therefore,compared with RR and NT,PR was more beneficial to the synergistic improvement of nitrogen metabolism,glucose metabolism,and light energy utilization at the seedling stage,increasing photosynthetic productivity and forming robust seedlings.The improvement of carbon and nitrogen metabolism and photosynthetic capacity by RR was higher than that by NT but was weaker than that by PR.There were no significant differences between PR and RR in the grain number per spike,single grain weight of the main stem(P>0.05),but they were significantly higher than those under NT(P<0.05).The grain number per spike in the first and second tillers under PR was significantly higher than that under RR and NT(P<0.05),but single grain weight and grain yield per spike of the first,second,and third tillers were not significantly different between PR and RR(P>0.05).In conclusion,PR could improve the activity of glucose and nitrogen metabolism and photosynthetic physiology of the main stem and the first and second tillers of wheat in rice stubble,resulting in the increases of the grain number per spike and the productivity per spike through forming strong seedlings.

Key words: Wheat in rice stubble, Tillage methods, Tiller, Seedling growth, Enzymatic activity

Cite this article

LI Fujian, XU Dongyi, LIU Kaili, ZHU Min, LI Chunyan, ZHU Xinkai, DING Jinfeng, GUO Wenshan. Effects of Tillage Methods on Growth and Physiology of Seedlings Stem and Tillers and Their Productivity of Wheat in Rice Stubble[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(1): 58-67. doi: 10.7668/hbnxb.20192538.

share this article