Crops ›› 2023, Vol. 39 ›› Issue (2): 121-125.doi: 10.16035/j.issn.1001-7283.2023.02.017

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Effects of Weeds Control on the Yield and Quality of Double- Cropping Direct-Seeded High-Quality Late Indica Rice

Yang Shiqi1(), Chen Liming1, Zhou Yanzhi1,2, Tan Xueming1, Zeng Yongjun1, Shi Qinghua1, Pan Xiaohua1, Zeng Yanhua1()   

  1. 1Jiangxi Agricultural University/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Nanchang 330045, Jiangxi, China
    2Jiangxi Xinruifeng Biochemical Co., Ltd., Ji’an 331300, Jiangxi, China
  • Received:2021-11-12 Revised:2021-12-23 Online:2023-04-15 Published:2023-04-11

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Abstract:

In order to investigate the effects of weeds control on the yield formation and quality of double- cropping direct-seeded high-quality late indica rice, high-quality inbred rice Meixiangzhan 2 (MXZ2) and high- quality hybrid rice Taiyou 871 (TY871) were used as materials, the field experiment with two treatments of chemical herbicide weeding (CW) and non-weeding (NW) were conducted. Compared with NW treatment, the grain yields of MXZ2 and TY871 under CW treatment increased by 75.71% and 76.00%, respectively, mainly due to the significant increase in the effective panicles and the spikelets per panicle. Compared with NW treatment, CW treatment could generally improve the processing quality and appearance quality of direct-seeded rice, and the gel consistency significantly reduced by 7.65% and 8.03%, respectively. CW treatment significantly increased the starch peak viscosity, hot viscosity, breakdown value and final viscosity of direct-seeded late rice, decreased the setback value, and improved the palatability of cooked rice. However, NW treatment significantly reduced the consistence of MXZ2, and did not differ on the chalkiness grain rate, amylose content and protein content. In all, spraying chemical herbicides for weed control significantly increased the yield of direct-seeded high-quality late rice, and it could significantly improve the processing quality of direct-seeded high-quality late rice, while reduced the chalkiness and gel consistency of rice. In addition, chemical weed control significantly affected the values of rice starch RVA profiles, which was beneficial to the improvement on cooking and eating quality.

Key words: Direct-seeded late indica rice, Herbicides spraying, Weeds, Yield, Grain quality

Fig.1

Weed control efficiency of different herbicides"

Table 1

Effects of weed treatments on the yield and its components of direct-seeded rice"

品种
Variety		 处理
Treatment		 有效穗数
Effective panicle number (×104/hm2)		 穗粒数
Spikelet number per panicle		 结实率
Seed-setting rate (%)		 千粒重
1000-grain weight (g)		 产量
Yield (t/hm2)
MXZ2 NW 292.1±6.1c 90.8±6.1c 89.3±1.1a 19.7±1.2b 4.24±0.08d
CW 376.2±12.1a 121.9±5.4b 79.9±1.0b 20.0±0.7b 7.45±0.05b
TY871 NW 271.4±12.2cd 116.9±2.3b 90.1±1.7a 25.1±0.2a 4.50±0.22c
CW 341.1±9.6ab 133.7±5.5a 72.8±0.9c 25.7±0.4a 7.92±0.08a

Table 2

Effects of weed treatment on main quality traits of direct-seeded rice"

品种
Variety		 处理
Treatment		 加工品质
Industrial quality		 外观品质
Appearance quality		 蒸煮食味品质
Cooking and eating quality		 营养品质
Nutritional quality
糙米率
Brown rice
rate (%)		 精米率
Milled rice
rate (%)		 整精米率
Head rice
rate (%)		 垩白粒率
Chalkiness
grain rate (%)		 垩白度
Chalkiness
degree (%)		 胶稠度
Gel consistency
(mm)		 直链淀粉含量
Amylose
content (%)		 蛋白质含量
Protein
content (%)
MXZ2 NW 76.0±0.7d 69.9±0.6b 57.3±2.0b 9.0±1.0bc 3.2±0.2a 69.3±1.2a 14.6±0.2a 7.5±0.2a
CW 79.3±0.4b 72.2±0.6a 62.7±1.2a 8.7±1.2c 2.9±0.2a 64.0±2.0b 15.0±0.7a 7.8±0.3a
TY871 NW 78.3±0.6c 66.3±0.5c 57.2±1.9b 11.7±1.5a 3.0±0.2a 71.3±1.2a 14.3±0.5b 7.4±0.6a
CW 80.6±0.3a 70.5±0.8b 62.5±0.7a 11.3±0.6b 2.7±0.3a 66.0±0.4b 14.2±0.1b 7.8±0.2a

Table 3

Effects of different treatments on the rapid viscosity analyzer (RVA) profiles of direct-seeded rice"

品种
Variety		 处理
Treatment		 峰值黏度
Peak
viscosity (cP)		 热浆黏度
Hot viscosity
(cP)		 崩解值
Breakdown
(cP)		 最终黏度
Final
viscosity (cP)		 消减值
Setback
(cP)		 回复值
Consistence
(cP)		 糊化时间
Peak time
(min)		 糊化温度
Pasting
temperature (℃)
MXZ2 NW 3148.3±10.2c 1640.7±19.0b 1487.0±24.9c 2961.7±24.4c -56.0±12.5a 1321.0±6.1b 6.3±0.1b 86.4±0.9ab
CW 3361.7±29.2a 1754.3±24.4a 1759.7±25.5a 3172.0±20.0a -421.7±19.5c 1451.0±26.2a 6.1±0.1b 85.4±0.5b
TY871 NW 3090.7±22.8d 1585.7±12.6c 1414.7±41.6c 2896.7±12.6c -43.3±13.4a 1311.0±0.0b 6.3±0.1a 87.7±0.4a
CW 3300.3±27.7b 1658.3±12.0b 1639.0±30.2b 3047.7±60.7b -206.0±21.7b 1378.3±89.5ab 6.2±0.1b 86.9±0.9ab
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