| Cite this article: | 赵黎明,郑殿峰,沈雪峰,等.水稻机插秧株行间缺穴对农艺性状的影响[J].灌溉排水学报,0,():-. |
| ZHAO Li-ming,ZHENG Dian-feng,SHEN Xue-feng,et al.水稻机插秧株行间缺穴对农艺性状的影响[J].灌溉排水学报,0,():-. |
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| Effects of Missed Hole-seeding Between Plants and Rows on Rice Agronomic Characters by Mechanical Transplanting |
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ZHAO Li-ming, ZHENG Dian-feng, SHEN Xue-feng, FENG Nai-jie, HU Han-qiao, ZHOU Hang
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College of Binhai Agronomy,Guangdong Ocean University
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| Abstract: |
| 【Objective】The purpose of this paper is to explore the difference of rice yield and its composition caused by the type and quantity of rice hole-seeding under the condition of mechanized-transplanting, so as to provide a basis for popularizing mechanized and efficient rice production. 【Method】 In this experiment, Kongyu 131 (KY131) and Longjing 31 (LJ31) were used as experimental materials in the field. Two treatments, inter plant (P) and inter row (R), were set by artificially removing plant. Among them, the treatment of inter-plant was set with independent type (PI), interspecific type (PS) and mixed type (PM); the inter-row treatment was set with inter-row relative type (RR), inter-row reciprocal type (RP) and inter-row mixed type (RM), and the effects of different varieties and missed hole-seeding of inter-plant and row on rice yield were analyzed. 【Result】The results showed that there were significant differences between varieties and missed hole-seeding types in effective panicle number, seed setting rate, harvest index and grain yield per square meter. Compared with CK, the balance among yield components was broken under missed hole-seeding treatment, in which effective panicles number, grains number and grain yield were reduced, in which the average reduction of effective panicles among plants and rows was 13.45% and 15.44% respectively, and the average decrease of grain yield was 10.50% and 12.82% respectively. Missed hole-seeding could also change the rational allocation of morphological characters of main stem and re-adjust the change of grain yield according to different varieties. Under the condition of different hole number, the variation range of seed setting rate of KY131 was greater than that of LJ31, the effective panicles number per square meter, grains number, harvest index and grain yield were decreased with the increase of the holes number, and the falling range of yield increased with the increase of holes number. In the case of missed hole-seeding treatment, the falling range of yield in missed hole-seeding of inter-row treatment was higher than that in inter-plant treatment by 13.03%, and falling range of yield in KY131 was larger than that in LJ31 by 10.30%. The main controlling factors leading to the yield decline were effective panicles number and grains number, respectively. Correlation analysis showed that there was a very significant negative correlation between hole number and grain yield, and the negative effect of hole deficiency on effective panicle number and 1000-grain weight of KY131 was greater than that of LJ31. The number of effective panicles per square meter and grains per square meter were significantly positively correlated with grain yield, in which the correlation coefficients of effective panicles number were KY131 (0.9547**) > LJ31 (0.8904**), the correlation coefficients of grains number were LJ31 (0.9812**) > KY131 (0.9125**), and the correlation coefficient between plants and rows changed in reverse among varieties. 【Conclusion】The comprehensive analysis showed that missed hole-seeding between plants and rows of rice seedlings by artificial simulator had a negative effect on many characters of rice in a certain area, disturbed the coordination and complementarity among characters, reduced grain yield, and was not conducive to the efficient combination of farm machinery with agronomy. |
| Key words: rice; missing hole; mechanized-transplanting; yield |
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