不同耕作方式对杂交籼稻生长特性和产量形成的影响

以杂交籼稻内5优5399为试验材料,研究了不同耕作方式对杂交籼稻生长特性和产量形成的影响。结果表明,不同耕作方式对杂交籼稻的分蘖、成穗率、叶面积指数、茎鞘物质转运量、茎叶物质转运量、净同化率和作物生长率均无显著影响,而干物质积累量在抽穗期达显著差异。在水稻全生育期内,旋耕处理的吸氮量和吸磷量均大于翻耕处理,但两处理亦无显著性差异;而两处理间的吸钾量在生育中期前差异达到显著水平,生育后期差异并不显著。产量构成方面,翻耕处理的每穗总粒数、结实率和千粒重显著高于旋耕处理,有效穗数高于旋耕处理,但差异未达显著水平。翻耕处理的产量为11 505.66 kg/hm~2,稍高于旋耕处理,两者差异未达到显著水平。综合来看,旋耕处理与翻耕处理对杂交籼稻生长特性和产量均无太大影响,从生产效率的角度来看,可根据实际情况推广旋耕耕作方式。

Effects of Different Tillage Methods on Growth Characteristics and Yield Formation of In-dica Hybrid Rice

Using Neiwuyou 5399 as material, the effects of different tillage methods on growth characteristics and yield formation of indica hybrid rice were studied. The results showed that there were no significant difference in tillering, effective spike rate, leaf area index, the transport capacity of stem, sheath and leaf, NAR and CGR, but the dry matter accumulation were significantly different at heading stage. During the whole growth period, the amount of nitrogen absorption and phosphorus absorption of rotary-tillage were higher than that of conventional-tillage, but there was no significant difference between the two treatments. There were significant dif-ference in potassium absorption before heading between the two treatments, but were not significant after heading. In yield formation, the total grains per panicle, seed setting rate and 1000 grain weight of conventional-tillage were significantly higher than those of ro-tary-tillage. The effective panicles of conventional-tillage was higher than that of rotary-tillage, but was not significant. The yield of conventional-tillage was 11505.66 kg/hm2, it was slightly higher than that of Rotary-tillage, but was not significant. On the whole, the effects of rotary-tillage and conventional-tillage treatments on growth characteristics and yield of hybrid indica rice were not too great. From the point of view of productivity, we can popularize the method of rotary tillage according to the actual situation.