粉垄耕作对甘蔗光合生理特性及产量品质的影响

为了探明粉垄耕作下甘蔗光合生理特性与甘蔗高质高产的相关性,阐明粉垄条件下甘蔗光合生理特性的响应,以'桂糖42号'为供试品种,设常规耕作(CK)和粉垄耕作(粉垄)共2个处理,采用田间随机区组设计,每个处理设3次重复.结果表明:甘蔗伸长期,粉垄甘蔗的叶绿素含量、苹果酸脱氢酶(NADP-MDH)活性、磷酸烯醇式丙酮酸羧化酶(...

Effects of Fenlong Tillage on Photosynthetic and Physiological Characteristics,Yield and Quality of Sugarcane (Saccharumofficinarum)

The purpose of this study was to explore the correlation between sugarcane photosynthetic physiological characteristics and high quality and yield of sugarcane, and to explain the effect of Fenlong tillage (deep ploughing, crushing, furrowing) on the photosynthetic physiological characteristics of sugarcane. Conventional tillage (CK) and Fenlong tillage (Fenlong) were used, and a field randomized block experiment design was adopted. At the elongation stage, the chlorophyll content, NADP malic acid dehydrogenase (NADP-MDH) activity, phosphoenolpyruvate carboxylase (PEPC) activity and ribulose 1, 5-bisphosphate carboxylase (RuBPC) activity in Fenlong were significantly higher than those in CK, and the enhancement was 5.4%, 18.6%, 23.5% and 30.9% respectively. In addition, the net photosynthetic rate, stomatal conductance and transpiration rate of the sugarcane under Fenlong tillage were significantly higher at the elongation and mature stages. Compared with conventional tillage, sugarcane single-stem weight, stem length, stem diameter, effective stalks and theoretical yield reached significant differences under Fenlong tillage. The single stem weight, stem length, stem diameter, effective stalks number, and theoretical yield increased by 32.7%, 13.1%, 17.6%, 5.3%, 20741 kg/hm ²respectively. The purity, brix, juice sugar content and the cane sugar content reached significant differences, increased by 5.2%, 9.0%, 14.5% and 13.4 % respectively. Fenlong tillage could increase the enzyme activity related to photosynthesis, chlorophyll content and net photosynthetic rate and other physiological indicators of sugarcane. Thereby, Fenlong tillage could improve the photosynthesis, growth of sugarcane and finally increase the yield and quality.