VAK Russia 06.01.2009
UDC 63
CSCSTI 68.29
CSCSTI 68.31
Russian Classification of Professions by Education 110000
Russian Library and Bibliographic Classification 40
Russian Trade and Bibliographic Classification 5607
Russian Trade and Bibliographic Classification 5611
BISAK TEC003000 Agriculture / General
BISAK TEC003080 Agriculture / Agronomy / General
In the dry steppe zone of the Tersko-Sulak sub-province of the Republic of Dagestan, a positive effect of drip irrigation against the background of heap tillage on the yield and quality of sweet pepper fruits was established. The effectiveness of maintaining the pre-irrigation threshold for soil moisture not less than 80 % of HB in the root-inhabited layer in combination with dump tillage to a depth of 0.23…0.25 m proved. This combination provides fruit yield at the level of 60…62 t/ha with an increase in sugar content and content Vitamin C compared to fine processing. The data obtained indicate the inappropriateness of the use of fine processing sweet pepper at 0.10…0.12 m under irrigated conditions, which leads to a deterioration in agrophysical and phytosanitary indicators of fertility. In particular, the soil density increases by 0.05…0.08 t/m3, the number of water-resistant aggregates decreases by 7 %, water permeability decreases by 22 % and the coefficient of water resistance increases by more than 2 times weed plantings and potential soil weed. Determined that out of the three studied constant pre-irrigation thresholds of humidity of the root layer (70, 80 and 90 % LMC), the best conditions for plant growth and development are formed at 80 % LMC: photosynthetic potential increases by 12 %, photosynthesis net productivity by 20.9 %, the efficiency of photosynthetically active radiation to 1.02 %, a decrease in the utilization rate of irrigation water by 28.3 % (70.3 m3/t). In order to maintaining a pre-irrigation moisture threshold of at least 80 % LMC, irrigations with a norm of 216 m3/ha carried out, after-planting irrigation of seedlings with an irrigation norm of 65 m3/ha with an average irrigation rate of 4384 m3/ha The combination of pre-irrigation threshold in a layer of 0.5 m 80 % LMC and dump processing provides a return on production costs of 173.1 % with a payback period of 1 year.
drip irrigation, sweet pepper, preirrigation thresholds, tillage, productivity
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