Inversion of nitrogen and phosphorus contents in cotton leaves based on the Gaussian mixture model and differences in hyperspectral features of UAV.

The nitrogen (N) and phosphorus (P) contents in cotton leaves can directly reflect growth conditions. Rapid and nondestructive acquisition of the N and P content in cotton leaves at the field scale is essential for rational fertilization strategies and precision agriculture. However, traditional direct destructive sampling in the field is performed at the sample point scale, which cannot rapidly obtain cotton leaf N and P content from the entire field.

Optimization of the fermentation media and growth conditions of BHZ-29 using a Plackett-Burman design experiment combined with response surface methodology.

Introduction: occurs extensively in the soil environment. It produces a range of antimicrobial compounds that play an important role in the field of biological control. However, during the actual application process it is often affected by factors such as the medium formulation and fermentation conditions, and therefore biocontrol measures often do not achieve their expected outcomes.

Exogenous Selenium and Biochar Application Modulate the Growth and Selenium Uptake of Medicinal Legume Species.

species have a certain capacity to enrich selenium (Se) and are the strongest Se hyperaccumulator legumes known globally at present. The biochar application to medicinal plants has been reported to affect plant metabolites. In this study, we aimed to employ hyperaccumulating species in the plant growth of selenium-lacked soil, while also investigating the impact of varying selenium doses and biochar application on legumes growth, selenium content, and secondary metabolite production.

Development of natural fiber-based degradable nonwoven mulch from recyclable mill waste.

The extensively used agricultural polyethylene mulch is associated with serious environmental pollution because it is difficult to degrade. This study evaluated the feasibility and degradability of a new mulch that was fabricated entirely from recyclable biodegradable natural fibers. In 2018, three types of this new natural fiber-based mulch were prepared from textile mill waste using needle-punched nonwoven technology and characterized using both laboratory and field tests.

Spectral Exploration of Calcium Accumulation in Organic Matter in Gray Desert Soil from Northwest China.

Little attention has been paid to the accumulation of soil organic matter (SOM) in the fringes of the mid-latitude desert. In this paper, soil samples from a long-term field experiment conducted from 1990 to 2013 at a research station in Urumqi, China by different fertilizer treatments, were used to determine soil properties and soil dissolved organic matter (DOM) by chemical analysis, fluorescence excitation emission matrix (EEM) spectroscopy, and high resolution-transmission electron microscopy (HR-TEM). The binding features of DOM under the addition of Ca(2+) were analyzed using a two-dimensional (2D) Fourier transform infrared (FTIR) spectrometer further to explore the response of the DOM to increasing concentrations of Ca(2+).