论文部分内容阅读
为探讨不同耕作方式对夏大豆产量形成及经济效益的影响,于2013年、2014年连续两年进行了复播大豆翻耕覆膜(TP)、翻耕(T)、旋耕(RT)和免耕(NT)_4种不同耕作方式的田间试验。结果表明:不同耕作方式对复播大豆测定期间的植株性状、单株绿叶面积、净光合势(LAD)、光合特性、产量和经济效益均有显著影响,且两年各处理的各项指标基本表现为TP>T>RT>NT。其中,TP处理的株高、茎粗、最大单株绿叶面积两年平均值均显著高于NT处理的平均值,分别高出19.87%、36.36%和34.83%;开花期-鼓粒期的光合特性表现为:TP使大豆叶片的净光合速率、气孔导度和蒸腾速率增加,而胞间CO_2浓度降低;各处理两年的LAD均表现为随着生育进程的推进呈先增后降的变化趋势,并于结荚期-鼓粒期内达到最大值。产量也以TP处理的最高,两年平均达到2082.69 kg hm~(-2),分别比T、RT、NT处理高出11.32%、24.84%、23.99%,并均达显著差异水平。两年平均经济效益以TP处理的纯收益最高,达1448.74元hm~(-2),较最低的免耕处理高出164.10%。
In order to explore the effects of different tillage methods on the yield formation and economic benefits of summer soybean, TP, T, RT and No Tillage (NT) _4 Field Tillage with Different Tillage Practices. The results showed that different tillage methods had significant effects on plant traits, green leaf area per plant, net photosynthetic potential (LAD), photosynthetic characteristics, yield and economic benefits during the two years’ The performance of TP> T> RT> NT. Among them, the two-year average of plant height, stem diameter and maximum green leaf area per plant in TP treatment were significantly higher than those in NT treatment by 19.87%, 36.36% and 34.83%, respectively; The characteristics of TP were as follows: TP increased the net photosynthetic rate, stomatal conductance and transpiration rate of soybean leaves, while the intracellular CO 2 concentration decreased; the LAD of two years of treatment showed the first increase and then decrease with the progress of birth Trend, and reached the maximum during the pod-drum period. The yield was also the highest in TP treatment, reaching an average of 2082.69 kg hm -2 in two years, which were 11.32%, 24.84% and 23.99% higher than those of T, RT and NT, respectively, reaching significant differences. The average annual net profit of TP was the highest, reaching 1448.74 yuan hm -2, which was 164.10% higher than the lowest no-till treatment.