Experimental study on the correlation between hill direct seeding rate and field seedling rate of typical rice varieties in cold areas

Tang, Han; Jiang, Yeming; Xu, Changsu; Zhou, Weijian; Wang, Qi; Wang, Yijia

doi:10.25165/j.ijabe.20211405.6020

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…In this case, the radius is 47 mm when the polar angle of the point on the curve is 0 • , and the radius is 56 mm when the polar angle is 90 • . According to Equation (7), the track curve BC in the adjusting mechanism can be represented as follows: r = exp(θ + 34.5)/8.96 (9) where, r is the polar radius of the point on the curve BC (mm); θ is the polar angle of the point on curve BC ( • ).…”

Section: Design Of the Seeding Rate Adjusting Mechanismmentioning

confidence: 99%

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Design and Verification of the Variable Capacity Roller-Wheel Precision Rice Direct Seed-Metering Device

Zhao

Yan

et al. 2022

Agronomy

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In view of the problems of the inability to continuously adjust the seeding rate, small adjustment range, and low precision of the rice direct seed-metering device, a variable capacity roller-wheel seed-metering device was designed, fabricated, and verified. With the variable capacity method, the seeding rate could be adjusted steplessly and with high precision through the seeding rate adjusting mechanism. Meanwhile, theoretical analysis and parametric design of the critical components, such as the seeding wheel and the seeding rate adjusting mechanism, were carried out. The rotation speed of the seed-metering device, the sphericity of rice seeds, and the adjustment depth were selected as the main influencing factors of the experiment. Then, the full-factor experiment was conducted, and the results of the bench validation experiments showed that the average seeds per hill error of the seed-metering device could be controlled within 2%. Meanwhile, the seed-metering device performed the best when the rotation speed of the seed meter device was 30 r/min, the sphericity of rice seeds was 52.7%, and the hole depth was 6 mm. Compared to the conventional mechanical precision seed-metering device, the designed seed-metering device offered better seeding performance. The research results provide theoretical and practical references for the design of a rice seed-metering device and the development of precision agriculture.

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Section: Design Of the Seeding Rate Adjusting Mechanismmentioning

confidence: 99%

“…China's rice output ranks first in the world, with a total rice output of over 200 million tons [4,5]. Rice is cultivated in a quarter of the arable land in China and supports more than half of its population [6][7][8]. Traditional rice planting involves many steps such as raising and transplanting seedlings [9].…”

Section: Introductionmentioning

confidence: 99%

Design and Verification of the Variable Capacity Roller-Wheel Precision Rice Direct Seed-Metering Device

Zhao

Yan

et al. 2022

Agronomy

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“…Heilongjiang Province, the largest Japonica rice production base in China, is located in northeast China, with low temperature and large difference between day and night. 4 In this region, seeds are sown directly in the field without plastic film covering, which greatly increases the risk of exposure to chilling stress compared with transplanting rice. The chilling stress is known to inhibit many physiological and metabolic processes 5 and generate large amounts of reactive oxygen species (ROS) in plant cells that trigger lipid peroxidation in membranes.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Heilongjiang Province, the largest Japonica rice production base in China, is located in northeast China, with low temperature and large difference between day and night . In this region, seeds are sown directly in the field without plastic film covering, which greatly increases the risk of exposure to chilling stress compared with transplanting rice.…”

Section: Introductionmentioning

confidence: 99%

Integrated Physiological, Transcriptomic, and Metabolomic Analysis Reveals the Mechanism of Guvermectin Promoting Seed Germination in Direct-Seeded Rice under Chilling Stress

Liu

Bing

et al. 2023

J. Agric. Food Chem.

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Rice direct seeding technology has been considered as a promising alternative to traditional transplanting because of its advantages in saving labor and water. However, the poor emergence and seedling growth caused by chill stress are the main bottlenecks in wide-scale adoption of direct-seeded rice in Heilongjiang Province, China. Here, we found that natural plant growth regulator guvermectin (GV) effectively improved rice seed germination and seedling growth under chilling stress. Results from 2 year field trials showed that seed-soaking with GV not only enhanced the emergence rate and seedling growth but also increased the panicle number per plant and grain number per panicle, resulting in 9.0 and 6.8% increase in the yield of direct-seeded rice, respectively. Integrative physiological, transcriptomic, and metabolomic assays revealed that GV promoted seed germination under chilling stress mainly by enhancing the activities of α-amylase and antioxidant enzymes (superoxide dismutase, peroxidase, and catalase), increasing the contents of soluble sugar and soluble protein, improving the biosynthesis of glutathione and flavonoids, as well as activating gibberellin-responsive transcription factors and inhibiting the abscisic acid signaling pathway. These findings indicate that seed-soaking with GV has good potential to improve seedling establishment and yield of direct-seeded rice even under chilling stress.

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“…Temperature and light resources in the lower reaches of the Yangtze River are abundant in one season but scarce in two others, with regional differences [9][10][11]. Varieties of directseeded rice differ in terms of temperature and light sensitivity and growth characteristics, resulting in varying adaptability to temperature and light during the late season [12][13][14]. The appropriate sowing date of the different varieties may fundamentally affect their characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sowing Date on the Growth Characteristics and Yield of Growth-Constrained Direct-Seeding Rice

Zhang

Zhou

Ashen

et al. 2023

Plants

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To investigate changes in the yield and physiological characteristics of indica hybrid rice varieties sown on different dates, we evaluated appropriate hybrid rice varieties and their optimal sowing dates in the hilly areas of Sichuan. Three popular indica rice varieties were used as experimental materials, and five sowing dates were set uniformly locally [16 May (SD1), 23 May (SD2), 30 May (SD3), 6 June (SD4), and 13 June (SD5)] to investigate differences in the yield characteristics, growth period, and dry matter accumulation. The results showed that, over the two years, the sowing-to-heading period and overall growth period of the three varieties shortened as the sowing date was delayed, and the difference in yield between the SD1 and SD2 treatments was not significant, owing to higher material accumulation after flowering and higher assimilative material transport capacity. These varieties are both photosensitive and tolerant to low temperatures. Among the three varieties tested, the Huangyouyuehesimiao (V3) cultivar had the highest yield, with 10.75 t ha−1 under the SD2 treatment. The impact of shifting the sowing date on yield components varied. Delaying the sowing date increased and then decreased the number of effective panicles, and the number of grains per panicle and the seed setting rate decreased by differing degrees. In summary, a high yield of indica hybrid rice can be maintained by sowing between 16 and 23 May each year in the study area. It indicated that indica hybrid rice in the hilly rice-producing region of Sichuan is highly adaptable to different sowing dates.

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Experimental study on the correlation between hill direct seeding rate and field seedling rate of typical rice varieties in cold areas

Cited by 3 publications

References 11 publications

Design and Verification of the Variable Capacity Roller-Wheel Precision Rice Direct Seed-Metering Device

Design and Verification of the Variable Capacity Roller-Wheel Precision Rice Direct Seed-Metering Device

Integrated Physiological, Transcriptomic, and Metabolomic Analysis Reveals the Mechanism of Guvermectin Promoting Seed Germination in Direct-Seeded Rice under Chilling Stress

Effect of Sowing Date on the Growth Characteristics and Yield of Growth-Constrained Direct-Seeding Rice

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