Cold-resistant Agent: Foliar Spraying Application Method and Its Effect on Cold Resistance of Rice Seedlings

doi:10.11924/j.issn.1000-6850.casb2020-0024

Abstract

Abstract:

The purpose is to study the foliar spraying application method of cold-resistant agent KHYE-1 and its effect on cold resistance of rice seedlings. The early rice variety ‘Zhongjiazao 17’ was used as material, the seedlings were treated with cold-resistant agent and cold stress, and the biochemical indexes of seedlings were further detected with chemical and biochemical method. The results showed that the best application method of KHYE-1 was spray concentration of 0.5%, one time per day for 3 days and spray dosage of 5.0 g/box. Compared with CK, the content of N (Nitrogen), P (Phosphorus), K (Potassium) and the value of chlorophyll SPAD in rice seedlings treated with cold-resistant agent under cold stress maintained at a relatively high level, and the content of soluble sugar and proline increased by 147.4% and 72.0%, and the activities of peroxidase (POD) and catalase (CAT) were 80.2% and 2.63% higher, respectively. In conclusion, the overall effect of KHYE-1 is better than that of ABA, and it could improve the cold-resistance of rice seedlings.

Key words: rice, cold-resistant agent, foliar spraying, cold resistance, cold stress

CLC Number:

S426

Ren Bo, Wang Hanying, Fu Tingyu, Wen Zhuyou, Xiong Hairong, Zhang Xianwen. Cold-resistant Agent: Foliar Spraying Application Method and Its Effect on Cold Resistance of Rice Seedlings[J]. Chinese Agricultural Science Bulletin, 2020, 36(33): 1-6.

Figures/Tables 7

References 37

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处理	叶喷浓度/%
处理	0	0.2	0.3	0.4	0.5	0.6
CK	114.9eE	—	—	—	—	—
KHYE-1	—	196.5cdCD	216.9cBC	240.1bB	295.9aA	175.8dD

处理	叶喷浓度/%
处理	0	0.2	0.3	0.4	0.5	0.6
CK	114.9eE	—	—	—	—	—
KHYE-1	—	196.5cdCD	216.9cBC	240.1bB	295.9aA	175.8dD

处理	叶喷用量/(g/盒)
处理	0	3.0	5.0	7.0
CK	131.3dD	—	—	—
KHYE-1	—	211.4bB	252.5aA	183.9cC

处理	叶喷用量/(g/盒)
处理	0	3.0	5.0	7.0
CK	131.3dD	—	—	—
KHYE-1	—	211.4bB	252.5aA	183.9cC

处理	叶喷次数
处理	0	1	2	3
CK	139.2cC	—	—	—
KHYE-1	—	195.4bB	203.9bB	236.3aA