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为了了解不同硫肥对水稻的效应及在水稻栽培农业生态系统中硫的循环与平衡情况,采用随机区组设计,将不同来源的硫肥设为7个处理包括:对照(不施硫),硫酸铵,过磷酸钙,自然硫素,石膏,50%石膏+50%自然硫素,70%石膏+30%自然硫素,对水稻进行处理。试验结果表明,不同硫肥对早稻谷粒产量有显著的影响,与对照相比,产量增加9.1%~10.3%。在早稻上施用硫肥可以提高干稻草产量和每公顷有效穗数,稻草产量增加5.3%~11.6%。施硫肥对株高和穗长没有明显影响,但可以提高结实率和千粒重。在早晚稻的稻草和谷粒中,硫含量没有明显提高,但在早稻明显提高了硫的吸收。施硫肥可以使水稻获得较好的效益,其中自然硫处理的净产值最高为1882.6元/ha。在广西,以水稻-水稻为栽培方式的地区每年施用30Skg/ha,土壤中硫保持正向平衡,而如果不采用这个施肥比例,土壤硫保持为负平衡;在这些地区,利用各种硫源包括硫肥施硫,对水稻生产将是一种较好的策略。
In order to understand the effects of different sulfur fertilizers on rice and the cycling and balance of sulfur in rice-cultivation agroecosystems, the randomized block design was used to set different sources of sulfur fertilizer as 7 treatments including: control (no sulfur application) Ammonium sulphate, superphosphate, natural sulfur, gypsum, 50% gypsum + 50% natural sulfur, 70% gypsum + 30% natural sulfur to treat rice. The results showed that different sulfur fertilizers had a significant impact on the grain yield of early rice, and the yield increased 9.1% ~ 10.3% compared with the control. The application of sulfur fertilizer to early rice could increase the dry straw output and the effective panicle per hectare, and the straw output increased by 5.3% ~ 11.6%. Sulfur fertilizer on plant height and spike length did not significantly affect, but can improve the seed setting rate and 1000-grain weight. In the morning and evening rice straw and grain, sulfur content did not significantly improve, but in early rice significantly increased sulfur absorption. Application of sulfur fertilizer can make rice get better benefits, of which the highest net output of natural sulfur treatment of 1882.6 yuan / ha. In Guangxi, 30Skg / ha was applied annually in paddy-rice cultivation areas, and the sulfur in the soil kept a positive balance, whereas soil sulfur remained negatively balanced without using this fertilization rate. In these areas, various sulfur sources Including sulfur fertilizer sulfur, rice production will be a better strategy.