Effects of Different Soil Tillage Systems on Dry Matter Accumulation and Yield of Rice in Double Cropping Rice Field

doi:10.7668/hbnxb.201751185

Abstract

Abstract: In order to explore the characteristics of dry matter accumulation and grain yield of rice under different soil tillage systems in a Chinese milk vetch and double cropping rice system, the dry matter accumulation and grain yield of early rice and late rice were analyzed by using conventional experimental analysis methods from 2016 to 2017. The experiment included four different soil tillage treatments:conventional tillage plus residue incorporation (CT), rotary tillage plus residue incorporation (RT), no tillage plus residue retention (NT), and rotary tillage plus residue removement (RTO). The results showed that in different soil tillage treatments, the leaf area index was CT > RT > NT > RTO at the main growth stages of early rice and late rice. And the dry weights of roots, shoots, stems, leaves and panicles of population were also CT > RT > NT > RTO at the main growth stages of early rice and late rice. Meanwhile, the dry matter weight ratio of root to total plant at the heading stage and maturity stage of early rice and late rice had the trend of CT > RT > NT > RTO. The dry matter weight ratio of stem to total plant in RTO treatment was higher than that of other treatments at the heading stage and maturity stage of early rice and late rice. And the dry matter weight ratio of leaf to total plant in NT and RTO treatments was higher than that of other treatments at the seedling stage and tillering stage of early rice and late rice. In addition, the dry matter weight ratio of panicle to total plant in RT and NT treatments was higher than that of other treatments at maturity stage of early rice and late rice. The grain yield of early rice and late rice in different soil tillage treatments was CT > RT > NT > RTO. Compared with RTO treatment, the grain yields of early rice in CT, RT and NT treatments increased by 733.3, 534.1,300.5 kg/ha in 2016 and 731.1, 556.9, 276.2 kg/ha in 2017, respectively, while the grain yields of late rice in CT, RT and NT treatments increased by 582.5, 399.8,282.9 kg/ha in 2016 and 717.6, 558.9,345.1 kg/ha in 2017, respectively. The results indicated that the combined application of conventional tillage or rotational tillage with residue incorporation was an effective way for increasing the dry matter accumulation of rice plant and making the dry matter distribution more reasonable, so as to improve the grain yield and yield components of rice.

Key words: Rice, Double cropping rice area, Soil tillage pattern, Straw incorporation, Dry matter, Yield

CLC Number:

S511

TANG Haiming, LI Chao, XIAO Xiaoping, TANG Wenguang, GUO Lijun, CHENG Kaikai, PAN Xiaochen, WANG Ke, SUN Geng. Effects of Different Soil Tillage Systems on Dry Matter Accumulation and Yield of Rice in Double Cropping Rice Field[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(3): 137-146. doi: 10.7668/hbnxb.201751185.

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