Abstract: In order to explore the effect of plastic film mulching on the growth and yield of millet, clarify the mechanism of plastic film increase production, and provides theoretical basis for the whole film dibbling technology in the summer crops, a study on influence mechanism of film mulching on growth development and yield had been conducted. The test using spit plot experiment design was executed in Shijiazhuang luancheng Qiema experimental station, 2015. The main plot had two treatments, respectively is plastic mulch and no plastic mulch. The split plot had three varieties, respectively is Jigu 19, 36 and 38. Under the condition of plastic mulch and no plastic mulch, the morphological characteristics, yield and its traits, flag leaf SPAD values and flag leaf net photosynthetic at heading stage millet rate were studied. Results show that:compared with no plastic mulch, the sum area of top three leaves increased 12.83-26.36 cm², chlorophyll SPAD value increased 8.2%-17.1%, net photosynthetic rate increased 34.9%-34.9%, and yield increased 7.3%-10.8%. Yield performance of Jigu 36 was better than Jigu 19 and Jigu 38, and yields of three varieties (especially Jigu 38) were improved by film mulching. Yield had a significantly positive correlation with 2nd top leaf area, net photosynthetic rate, leaf area and the top three leaves area. Flag leaf area was positively correlated with grain weight per ear and ear length. Therefore, the growth and developing physiological stage of top leaves (especially 1st top leaf), film mulching affected the growth of ear and increased millet yield eventually.

Key words: Foxtail millet, Film mulching, Growth development, Yield, Correlation

CLC Number: 

• S565.01