Influences of wide-narrow seeding on soil properties and winter wheat yields under conservation tillage in North China Plain

Abstract

In order to promote the winter wheat yield and guarantee seeding quality in double-cropping system, no-tillage or reduced tillage planting modes with different row spacing have been implemented to result in different levels of yield. A three-year (2012-2015) field experiment was conducted on the experimental farm at Zhuozhou of Hebei Province in North China Plain to compare winter wheat yield from the two planting modes: wide-narrow row space planting mode (WN) and uniform row space planting mode (UR) Both planting modes were performed under reduced tillage conditions with straw mulching. The results showed that in North China Plain WN had positive impacts on crop yield, yield components, leaf area index (LAI) and intercepted photosynthetically active radiation (IPAR) index. Comparing with the UR, IPAR and LAI index for WN were enhanced by 4.8% and 5.2%, respectively. The average yield for WN was 7.2%, significantly greater than that of UR under the same quantity and density. In addition, for WN mode, machinery could pass through with less blocking under large amount of straw mulching, which largely improved tillage efficiency and potentially popularized the conservation tillage technology in North China plain. It is therefore recommended that wide-narrow row space planting mode (WN) combined with reduced tillage and straw mulching be more suitable for conservation tillage in double-cropping pattern areas in North China Plain.

Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller

“…Defining the cross-sectional area before and after operation of the SRTs was A q and A h , respectively ( Figure 12). Soil bulking intensity P can be obtained by Equation (10). (Figure 12).…”

“…SRT mixes and buries a large amount of plant residue, and breaks/shatters the deeper compaction layers, from the winter wheat-summer maize double cropping system of. Planting areas are quite large, and the farming cycle is short due to the harsh cold winters [10] . The SRT of subsoiler shanks were evenly mounted in front of rotary tiller.…”

Growing-season soil microbial respiration response to long-term no tillage and spring ridge tillage

“…Crop SR is highest during the growth period (seedling to maturity growth phases) [8] . Numerous studies on soil-temperature interactions indicate that the SR rate has a close relationship to soil temperature [9][10][11] . When the temperature declines below 0°C, the majority of microbial activities ceases [12] .…”

Performance of waterjet on cutting maize stalks: A preliminary investigation

“…Thus, one of the key operations of CA is no-till direct seeding on biomass mulch cover land, which consequently creates higher demands on seeding machinery [2,3] . In the North China Plain, the most popular cropping system is to grow two successive crops [4] , maize as summer crop and wheat as winter crop, within the same year. Winter wheat should be directly drilled into the stubble of summer maize.…”

“…Specifically, in two crops a year areas in China, maize has only been harvested while its straw is tough, and may therefore be pressed into the soil rather than being cut by the discs. Meanwhile, strip-chop and strip-till [4,8] , which cut straw by rotary blades, are also put forward. On the other hand, straw may wind around the blade roller, and straw cutting quality does not always meet seeding requirements.…”