A 34.7% gain in Heihe: soybean measured under expert panel
At an official field measurement in Heihe, Heilongjiang, the soybean block treated with the bio-coupling inoculant returned 34.7% more than the untreated control — the same Aspergillus–Rhizobia Coupling science our Orvan™ range delivers.
On 10 October 2023, an expert panel convened by the National Agro-Tech Extension and Service Centre came to Xigangzi Village in Aihui District, Heihe, Heilongjiang, to cut and weigh a soybean demonstration. Moisture-adjusted, the block treated with the bio-coupling inoculant returned 152.82 kg per mu; the untreated control returned 113.46 kg — a gain of 34.7%. The project behind it — quality, nitrogen fixation and green yield, taken from research through to production — is run by the CAAS Oil Crops Research Institute (OCRI-CAAS) together with Xinyangfeng and others, with Academician Li Peiwu present at the measurement.
Where the number was taken
Heihe is the right place to measure a soybean claim: it grows about a third of all the soybean in Heilongjiang and close to a seventh of the national crop, so a new method proven here means something. The two blocks were identical in variety, sowing date and field management; the only difference, the site’s technical lead Zhang Qi of OCRI-CAAS noted, was the microbial inoculant added to the treated strip. The panel walked the field, checked the variety, sowing date and management, chose uniformly-growing plots in both the treated and control strips, measured the area, and took the yield by combine across the whole plot — cut and weighed on the spot.
Xigangzi demonstration, Heihe, measured 10 October 2023
| Figure | |
|---|---|
| Measured yield, treated block | 152.82 kg/mu |
| Untreated control | 113.46 kg/mu |
| Yield gain | +34.7% |
| Plant height vs control | +16.83% |
| Pods per plant vs control | +25.65% |
| Grains per plant vs control | +29.32% |
What the plants showed
The gain was not only on the scale. After treatment the blighted-pod rate fell and the crop set more podding layers; on the day of harvest the roots still carried a mass of live nodules — nodulation still working when many crops have long since stopped. Against the control, plant height, pods per plant and grains per plant were up 16.83%, 25.65% and 29.32%. One grower from the village, Xu Changsheng, had tried the inoculant on a wait-and-see basis: vigorous, disease-resistant seedlings that covered the ground well, and at maturity more pods, three or four grains to a pod, and a yield he could see was different.
The technology underneath it
The bio-coupling was developed over more than two decades by Academician Li Peiwu’s team at OCRI-CAAS, out of coupling the control of aflatoxin risk at the soil source with the induction of nodulation and nitrogen fixation. Applied as a microbial inoculant, it induces nodulation and fixation from the rhizobia already in the soil rather than adding rhizobia of its own — which is exactly the logic our Orvan™ range is built on.
Li Peiwu, speaking in the field, framed Heihe as one reading among many: 2023 was the second year of national soybean demonstrations, and across the country the cut-and-weighed results showed the same pattern — stronger early growth, even and sturdy stands, markedly lower disease incidence, and at harvest more pods per plant, brighter and more uniform grain, and a higher hundred-grain weight. On that evidence he put the coupling forward as real technical support for lifting national soybean yield per unit area.
The partner, and the scale
Xinyangfeng, a leading phosphate-and-compound-fertiliser producer, co-undertook the project in July 2023 as a Hubei major science-and-technology programme, and did much of the work on co-formulating the inoculant with compound fertiliser — using its production capacity to make a fertiliser-carried biofertiliser. In 2023 the programme placed 28 demonstration sites across the country — 13 in spring peanut, 7 in summer peanut, 8 in soybean — and the panel’s recommendation out of Heihe was to give the coupling priority extension across the Northeast soybean belt.
Where our Orvan™ range fits
The bio-coupling measured here is the same Aspergillus–Rhizobia Coupling that our Orvan™ range is built to deliver commercially. Applied alongside the crop’s rhizobia, it amplifies nodulation and nitrogen fixation rather than replacing the partner already in the soil. A gain measured this way — by an official panel, cut and weighed in front of them, against a control that differed only in the inoculant — is the kind of validation that stands behind what we put in the furrow.
The takeaway: at an official cut-and-weigh measurement in Heihe, soybean treated with bio-coupling returned 152.82 kg/mu against 113.46 kg/mu untreated — a 34.7% gain, with taller plants, more pods and more grains, and live nodules still on the roots at harvest. It is the same coupling science our Orvan™ range delivers.