Abstract
Mechanized rice direct seeding is a cost-effective and efficient approach for rice cultivation. Recently, the use of rice direct seeding has been increasing rapidly owing to rural labour shortages and continuous increases in agricultural production costs. This article reviews the research and application progress of mechanized rice direct seeding including direct seeding technologies, precision rice seeding, precision rice seed-metering devices, key supporting agronomy technologies for mechanized rice direct seeding. South China Agricultural University developed precision rice hill-drop drilling (PRHDD) with synchronous furrowing and ridging technology and series machines for paddy that affords remarkable advantages in terms of saving time and labour, higher yield, and higher efficiency. In this approach, pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil. It significantly improved the crop growth population and effectively solved the problems of high frequency of disease and pests caused by the irregular distribution of rice seeds with manual broadcasting, and generally reduces seed usage and increases the yield. Therefore, this technology has broad application prospects and great potential for promoting the development of mechanized rice direct seeding in China. Keywords: rice, precision rice seeder, hill-drop drilling for paddy rice, mechanical direct seeding DOI: 10.25165/j.ijabe.20181103.4249 Citation: Zhang M H, Wang Z M, Luo X W, Zang Y, Yang W W, Xing H, et al. Review of precision rice hill-drop drilling technology and machine for paddy. Int J Agric & Biol Eng, 2018; 11(3): 1–11.
Highlights
Rice is an important staple food crop in the world
The results showed that precision rice hill-drop drilling (PRHDD) reduced yellow roots by 20% and black roots by 13% and increased white roots by 33% compared to manual broadcasting
7.1 Conclusions Compared with other mechanized rice planting techniques, PRHDD with synchronous furrowing and ridging affords obvious advantages and conforms to the scientific concept of combining agricultural machinery and agronomy
Summary
Rice is an important staple food crop in the world. Its cultivated area worldwide is 160 million hm, and this accounts for 22.3% of the total crop planting area. It is important to achieve good quality, high yield, improved efficiency, and sustainability of rice production and to accelerate rice industrialization to ensure long-term food security. South China Agricultural University developed a precision rice hill-drop drilling (PRHDD) technology with synchronous furrowing and ridging for wet paddy. In this approach, pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil. Pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil It significantly improves the crop growth population and effectively solves the problems of high frequency of disease and pests caused by the irregular distribution. This study aims to analyse the research progress and application status of PRHDD technology and machinery with synchronous furrowing and ridging as well as key related agronomic techniques to provide references for the promotion and application of PRHDD technology
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