Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (17): 1-12.doi: 10.11924/j.issn.1000-6850.casb2020-0233

Special Issue: 水产渔业 水稻 农业生态

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Effects of Rice-crayfish Ecological Mode and Mechanical Planting Density on Yield and Quality of High-quality Taste Japonica Varieties

Dong Minghui1,2(), Gu Junrong1, Li Jinbin3, Wang Dongming4, Song Yunsheng1, Chen Peifeng1   

  1. 1Taihu Agricultural Research Institute of Jiangsu, Suzhou Jiangsu 215106
    2Yangzhou University, Key Laboratory of Crop Genetics and Physiology of Jiangsu, Yangzhou Jiangsu 225009
    3Shanghai Dafeng Seeds Industry Co., Ltd., Yancheng Jiangsu 224000
    4Guli Agricultural Extension Services Center of Changshu City, Suzhou Jiangsu 215515
  • Received:2020-07-03 Revised:2020-09-11 Online:2021-06-15 Published:2021-06-29

Abstract:

To understand the effects of rice-crayfish ecological planting and breeding on the yield and quality of fine palatable japonica rice in Taihu Lake region, and provide reference for the decision-making of rice-crayfish ecological planting and breeding, five rice varieties (lines) with good taste and two planting densities were selected to analyze the characteristics of rice yield and quality formation under different modes of rice-crayfish ecological planting and breeding and traditional rice cultivation. The results showed that the soil physical and chemical properties were significantly improved in rice-crayfish ecosystem compared with that of traditional field cultivation. The number of effective panicles increased significantly, but panicle formation rate, grain number per spike, seed setting rate, 1000 grain weight and yield decreased significantly. The chalkiness trait was significantly improved by the ecological planting and breeding, the contents of protein and amylose significantly were increased, as well as the disintegration value and gelatinization temperature, and the subtracting value was decreased. Reducing planting density could improve rice quality. There were differences among the varieties, and some related traits of rice quality were significantly affected by the interaction between planting patterns and varieties. In general, rice varieties with fine palatable quality is suitable for the long term rice-crayfish ecological planting and breeding, and proper reduction of nitrogen and planting density could ensure safe and stable production and achieve better taste quality.

Key words: rice-crayfish culture, ecological planting and breeding, planting density, high quality taste, grain yield, rice quality

CLC Number: