# Experiment on Cultivation Performance of Plant Fiber-Based Degradable Film in Paddy Field
## 4 Discussion and Conclusions  
Compared with CK, the plant fiber-based degradable film and plastic film reduced the weed by 85.5% to 87.7% and 78.7% to 81.7%, respectively. After the rice field is covered with film, the number of weeds is significantly reduced, thereby eliminating the weeding workers and medicines in the rice field and reducing the soil nutrient consumption. The main reason is that the low light transmittance of the plant fiber-based degradable film blocked the photosynthesis of the weeds. Rice mulching cultivation has changed the living space of weeds and inhibited the occurrence of many weeds. It indicates that mulching cultivation of rice cultivation technology has a certain control effect on common weeds and dominant weeds in rice fields. In this study, no herbicide was sprayed in each treatment, and the plant fiber-based degradable film and plastic film had a significant herbicidal effect, and the herbicide could be reduced or not used in the cover cultivation [32]. Plant fiber-based degradable film mulching cultivation can increase the soil temperature of soil layer 0 to 0.1 m depth. In 2015 to 2017, rice yield with plant fiber-based degradable film increased by 8.71%, 7.53%, and 9.02%, respectively. However, the overall warming effect of the plant fiber-based degradable film is slightly lower than that of the plastic film, which may be related to the poor transmittance of the plant fiber-based degradable film to the plastic film. During the blossom fruit period of rice, the temperature increase of plant fiber-based degradable film was the lowest or even decreased, which may be related to the degradation performance of plant fiber-based degradable film and the decrease of external temperature [33]. Plant fiber-based degradable film can significantly reduce the hardness, increase its adhesion, and improve the eating quality of rice. Different films mulching had a certain impact on crop economic benefit. During the panicle developmental stage, the plant fiber-based degradable film began to crack, and by the blossom fruit period, the degradation rate reached the grade of 3 or 4. Although the degradation rate and intensity of various degradable mulch films are different, the degradation processes are basically similar. Plant fiber-based degradable film mulching cultivation is equivalent to plastic film mulching cultivation in improving soil temperature. Plant fiber-based degradable film can not only exert the weed inhibition performance of plastic film, promote crop growth and development, accelerate the growth process, increase rice yield, improve rice quality, but also completely biodegrade without \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Year** & **Treatment** & **Tilering Stage** & **Panicle Development Stage** & **Blossom Fruit Period** \\ \hline \multirow{3}{*}{2015} & ZM & 0 [a] & 1 [b] & 3 [4] \\  & SM & 0 [a] & 0 [a] & 1 [b] \\  & CK & 0 [a] & 0 [a] & 0 [a] \\ \hline \multirow{3}{*}{2016} & ZM & 0 [a] & 2 [c] & 4 [e] \\  & SM & 0 [a] & 0 [a] & 1 [b] \\  & CK & 0 [a] & 0 [a] & 0 [a] \\ \hline \multirow{3}{*}{2017} & ZM & 0 [a] & 2 [c] & 3 [c] \\  & SM & 0 [a] & 0 [a] & 1 [b] \\ \cline{1-1}  & CK & 0 [a] & 0 [a] & 0 [a] \\ \hline \hline \end{tabular}  
* [a] 0: No crack; [b] 1: Cracks begin to appear; [c] 2: Hairline cracks appear in 25% of the film; [d] 3: Film appears 2.0–2.5 cm cracks.  
\end{table} 
Table 3: Effect of different films mulching on rice quality. pesticides and residual pollution in the soil. Therefore, in order to alleviate the white pollution of plastic film, solve the problem of weed removal in paddy field, create a more suitable ecological environment, and improve the yield and quality of rice, it is extremely important and environmentally significant to replace the plastic film with plant fiber-based degradable film for practical production, especially for organic rice production. However, further research is needed on the economic cost and agronomic characteristics. Methodology, X.M. and H.C.; Software, X.M. and H.C.; Validation, X.M.