Integrating Beef and Cotton Production Reduces Irrigation Needs in the Texas Southern High Plains

The Texas High Plains is a semiarid agricultural region located in the central south plains of the United States. This area exemplifies semiarid regions where water is becoming scarce. Crop production depends heavily on irrigation primarily from the Ogallala aquifer at non-sustainable rates of use. Irrigated monoculture cotton (Gossypium hirsutum L.) is the dominant crop but grazing livestock in this once vast grassland is re-emerging as the aquifer declines. Environmental benefits of integrated crop and livestock systems have been suggested. We compared a cotton monoculture with an integrated cotton-forage-beef stocker steer system over 10 yr to determine effects on irrigation water use, profitability, and other measures of sustainability. Long-term systems research can reveal dynamic changes that short term studies fail to capture and can provide opportunities to improve ecosystem function and sustainability (Allen et al. 2008)

Long-term efficacy of clinical hunger provocation to wean feeding tube dependent children

Background & aims: The incidence of tube feeding dependency seems to increase worldwide, and these children may remain on prolonged tube feeding for many months to years. The multidisciplinary clinical hunger provocation (CHP) program is an intensive inpatient intervention of usually 2–3 weeks, aimed at weaning children from tube feeding. CHP has been proven highly effective on the short term (80–86%), particularly when applied before the age of two years but long-term data are lacking. The aims of our study were to determine the long-term efficacy of the CHP program and factors associated with success or failure and to assess anthropometrics, feeding behavior, and medical outcomes at long-term follow-up. Methods: All tube-dependent children who underwent CHP at a tertiary hospital in Amsterdam, the Netherlands, between 2001 and 2014, and had a minimum follow-up of 12-months in 2015, were eligible to participate in this retrospective cohort study. During the CHP program, tube feeding is ceased stepwise to create appetite, according to a strict protocol. The program was defined successful if patients achieved oral intake and could be fully weaned from tube feeding following the CHP program. Acute malnourishment was defined as weight for height 1 SD within 3 months, chronic malnourishment as height for age <2 SD and both acute and chronic malnourishment as both a height for age and weight for height <2 SD. Long-term efficacy (tube free at varying follow-up periods), anthropometrics (height for age, weight for height), feeding behavior and medical outcomes were assessed by a structured cross-sectional parental interview. Results: In total, 57 patients were admitted to the CHP program. Fifty-two patients could be contacted of whom 42 participated in the study (response rate 81%) with a median age at admittance of 19 (IQR 13–22) months (62% female). The program was initially successful in 36/42 (86% (Bca CI 95% 75.0–95.2)) patients. A younger age upon initiation of tube feeding was negatively correlated with success (p 0.016). At follow-up, a median period of 67.0 (IQR 37.0–101.5) months after discharge, long-term efficacy was 32/41 (78% (Bca CI 95% 64.1–90.0)) (1 missing data). Patients with a successful CHP had beneficial outcomes compared to those with an unsuccessful CHP, showing less selective eating behavior (p 0.025), nocturnal feeding (p 0.044), forced feeding (p 0.044) and hospital admissions (p 0.028). However, 44% of successfully weaned patients fulfilled the criteria for malnourishment at long-term follow-up (13% acute, 22% chronic, and 9% both acute and chronic (compared to 22% at admittance: 13% acute, 6% chronic, and 3% both)). 59.4% of successfully weaned patients showed signs of developmental delays or were diagnosed with new medical diagnoses (43.8%) at long-term follow-up. Conclusions: The multidisciplinary CHP is a highly effective short-term (86%) and long-term (78%) intervention to wean young children from tube feeding, with beneficial feeding outcomes. However, at long-term follow-up, many successfully weaned patients were malnourished, showed signs of developmental delay, and were diagnosed with new medical diagnoses. For these reasons, patients should be monitored carefully during and after tube weaning, also after successful CHP. Tube dependency might be an early expression of medical diagnoses

Phenotypic and Biomass Yield Variations in Natural Populations of Prairie Cordgrass (Spartina pectinata Link) in the USA

Prairie cordgrass (Spartina pectinata Link) is a productive warm-season, C4 perennial grass native to most of North America having tolerance to wet, cold, and saline growing conditions. Excellent stress tolerance, along with high biomass yields, makes prairie cordgrass a good candidate as a dedicated energy crop on marginal land. However, there is little information available on genetic variation, including yield potential, of native populations in the USA. The objectives of this study were to evaluate biomass yield and to identify the nature and extent of genetic variation in natural populations of prairie cordgrass by comparing endemic strains collected throughout the USA. Forty-two prairie cordgrass populations were collected from prairie-remnant sites in 13 states and evaluated at the University of Illinois in Urbana, IL. The 4-year field study of prairie cordgrass revealed extensive variations in biomass yield and phenotypic traits associated with biomass yield among these populations. Strong correlations were observed between the phenotypic values and origins of the populations. Path coefficient analysis indicated that tiller mass, tiller density, heading date, plant height, and phytomer number positively affected biomass yield directly or indirectly. However, the phenotypic traits including biomass yield showed significant variation among years except for phytomer number and heading date. With the extensive genetic variability and high biomass yield potential demonstrated in this experiment, prairie cordgrass could become a highly productive bioenergy crop by developing a well-planned breeding program