四川稻麦双免耕固定厢沟栽培技术研究

通过定位试验、同田对比试验和生产示范相结合的方法，研究了固定厢沟双免耕技术(PBDZ)对稻麦产量的影响及其年际变化趋势，并对稻麦增产机理和经济效益进行了分析。结果表明：PBDZ栽培能显著提高稻麦产量。与传统栽培方法(TCT)相比，小麦增产6．7％-9．8％，水稻增产5．1％～6．7％；小麦增产幅度大于水稻，且小麦增产幅度呈逐年上升趋势，而水稻则呈下降趋势。PBDZ栽培的物质成本比TCT栽培方式减少1290元／hm^2，劳动力成本减少645元／hm^2，总成本降低19％，全年实现节本增收2782元／hm^2(76％)。本文还分析了PBDZ技术突破稻麦单产的土壤学、农艺学和生理生态基础。

Studies on permanent-bed-planting with double zero tillage for rice and wheat in Sichuan basin

Throughout the formal experiments at selected locations and comparison trials conducted in the same fields from 1993 to 1997,the technique of permanent-bed-planting with double zero tillage for rice and wheat(PBDZ) was investigated.The aim was to determine the influence on the yield of rice and wheat and the pattern of production trends,to determine the factors increasing yield for both rice and wheat and to evaluate economic benefits.The results showed that the PBDZ could significantly increase rice and wheat yield.Compared with the traditional cropping technique(TCT),wheat yield increased by 6.7 %-9.7 %,and rice yield by 5.1 %-6.7 %.The yield increase for wheat was more than that for rice,and the wheat yield showed an increasing trend over years,while the rice yield increase showed a gradual declining pattern.The substance cost of PBDZ was reduced by 1290 Yuan/hm2 compared to TCT,while labor cost was reduced by 645 Yuan/hm2.In addition to the yield and income increase of 847 Yuan/hm2,the annual saving in costs and the increase in income all together amount to 2782 Yuan/hm2,i.e.76 %increase over the traditional practice.The PBDZ technique has the theoretical basis of pedology,agronomy and physiological ecology to account for the increase in yield of rice and wheat.