Seedling quality and grain yield of rice to optimized seedling raising methods

doi:10.14088/j.cnki.issn0439-8114.2020.23.009

Abstract

Abstract: To solve the problems of soil acquisition difficulties,low quality of seedlings,w eak root twisting power,late greening and slow growth after transplanting in the industrialized rice seedling raising of the rice-wheat rotation area in North Central Hubei Province,Specifically,three different seedling raising methods were tested to study the effect of optimized seedling raising methods on seedling quality and grain yield:bast fiber mulching film combined with nutrient soil for seedling raising and mechanical transplanting (T1),bast fiber mulching film combined with organic matrix and chemical control for seedling raising and mechanical transplanting (T2) andbast fiber mulching film combined with organic matrix and nutrient soil mixed for seedling raising and mechanical transplanting (T3).Nutrient soil for seedling raising and mechanical transplanting (CK1) and water cultivation of seedling and artificial transplanting (CK2) were used as the controls.The results showed that compared with CK1,CK2 and T1 treatments,the seedlings quality of T2 and T3 treatments were higher,the tillering speed and the dry matter accumulation in the early growth stage after transplanting were faster,the leaf area index and SPAD value in each growth period were larger,andits effective panicle number,seed setting rate and grain yield increase.The grain yield of T2 and T3 treatments increased by 6.70%~6.95% compared to CK1 treatment,reaching a significant level;and increased by 4.90%~5.14% compared to CK2 treatment,reaching a significant level.The results indicated that the seedling raising methods of T2 and T3 can improve seedling quality and increase grain yield.

Key words: seedling raising method, seedling quality, mechanically transplanted rice, yield, yield composition

CLC Number:

S511

LI Zhi-xiang, TANG Ji-chao, WU Zhao-hui, HOU Wei, WU Shan, LU Bi-lin. Seedling quality and grain yield of rice to optimized seedling raising methods[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(23): 41-45.

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