The Experiment Research Of Water-fertilizer On Drip Water-fertilizer On Drip Irrigation For Potato Which Planted Under Mulch Planted Under Mulch In Ningxia Drought Areas

The experiment has used The Potato Eight In Heibei North and the method of Four Factors And Five Level Orthogonal Rotating to study the influence of water-fertilizer coupling on growth, production, quality, the change of soil-water and nutrient uptake and so on, the main conclusions include the following:(1)When the irrigation water achieved 14.15 (L/pot),N application, P application,K application achieved 1.74g、0.63g、1.75g,the plant height,thick stems, and leaf area of potato will achieve max, as 17.53 (cm)、0.64(cm)、162.68(cm2).(2)The influence order of actors on potato tuber is:P(x3)>N(X2)>W (X1)>K(X4),the influence of water-fertilizer interactive on items is:WP>WN>WK, the highest content of potato tuber is:17.60%、 17.62%、18.34%, the minimum content of potato tuber is:6.02%、5.72%、4.23%,the highest numerical minus the minimum numerical is:6.02%、5.72%、4.23%,when the tuber of potato achieve highest,the irrigation water is 930m3/hm2,the N application, P application,K application are 180 kg/hm2、240kg/hm2、 276.15kg/hm2.(3)The influence order of actors on potato production is:K(X4)>P(x3)>N(X2)>W(X1), the influence of water-fertilizer interactive on production is:WP>WN>WK. When the production of potato achieve highest,the irrigation water is 739m3/hm2,the N application, P application,K application are 57.8 kg/hm2、200.4 kg/hm2、178.4 kg/hm2.The highest potato production is 19.79 t/hm2.(4)The regular of soil water change is, the soil water will elevated after every irrigation, after a period of time, the soil water will reduced, this regular will actor all growth period of potato. The soil water consumption is:level-1> level 0>level l,the rate of the highest irrigation is minimum, the rate of the minimum irrigation is highest. When used space change on soil water, it is changed as the depth of soil changed in seeding period, when in budding period, flowering period and starch accumulation period, it will elevate and then reduce.(5))The influence order of actors on potato uptake N is:K(X4)>P(x3)>W(X1)>N(X2), the influence of water-fertilizer interactive is WN and WP, and the degree of interactive is equal. The influence order of actors on potato uptake P is:P(x3)> K(X4)> W (X1), the influence of water-fertilizer interactive is WN,WP and WK. The influence order of actors on potato uptake K is:P(x3)> W(X1)>K(X4)> N(X2), the influence of water-fertilizer interactive is WN,WP and WK, the interactive of WP is highest.