Design of Rice Planter with Plastic Film Mulched Drip Irrigation

Niu Qi, Wang Shiguo, Chen Xuegeng

Abstract

The rice planting area in China accounts for 21% of world’s planting area, but there is only 6% of water resource of the world. Water consumption of traditional rice planting was about 12000m3/hm2 〖JP〗in the whole growing period, which made a difficulty in planting rice at large scale in cold and arid region of China. In order to enlarge rice planting area and improve the level of mechanization in aerobic soil with plastic film mulching, planters were designed in different planting patterns to meet the agronomic requirements for rice cultivation with plastic film mulched drip irrigation. The parameters of key components (drum type dibbler and covering device) were determined by dynamics and kinematics analyses. Besides, the factors that affected sowing performance were confirmed as sowing roller’s radius (R), length of duckbilled soil opener of drum type dibbler (H) and walking speed (v), factors that affected mulching performance were diameter of mulching roller (D), lift helix angle (β) and walking speed (v) of planter. According to orthogonal test, the three factors and four levels orthogonal optimal experiments were carried out, which indicated the importance of the three factors for sowing performance were in the order as H>R>v. Meanwhile, for the mulching performance, the importance of the three factors were in the order as β>D>v. When the length of duckbilled soil opener was 28mm, radius of sowing roller was 180mm, lift helix angle was 35°, diameter of mulching roller was 360mm, and walking speed was 0.65m/s, the qualified rate of sowing depth was 92.6%, qualified rate of sowing number per hole was 94.7%, qualified rate of mulching was 91.2% and vacancy rate was 1.8%. The rice yield was 10500kg/hm2, the average spike number per hectare was 3.25 million. The performance of this planter could meet the technical requirement for rice sowing with plastic film mulched drip irrigation.


Keywords: rice with plastic film mulched drip irrigation, dry farming, planter, planting pattern

 

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