The ratio of GA3/ABA,IAA/ABA,Zr/ABA and iPA/ABA declined from unmulching to 6 ~ 7 year mulching,particularly GA3/ABA,IAA/ABA,GA3+IAA/ABA,and also decreased from 4 ~ 5 year mulching to 6 ~ 7 year mulching,the same as the aging year of rhizome.
The saving-water effects of the double mulching with plastic film and straw,and W plastic film techniques increase by 3.2%~8.7% and 0%~9.5% compared with the traditional plastic film mulching technique respectively.
The ridge mulched plastic film and furrow mulched straw cultivation module can increase water utilhzation efficiency to 11.59 kg·mm~(-1)·hm~(-2),and water saving of unit grain produce is 37.21%～39.85%,yield increasing of unit water consumption reaches 58.68%～66.25%,output and input proportion is 1.34∶1,which are higher than those of other mulching cultivation modules.
垄覆膜沟覆秸秆栽培模式提高水分利用效率到11.59 kg. mm-1.hm-2,单位粮食生产节水量达到37.21%~39.85%,单位耗水量增产达到58.68%~66.25%,产投比为1.34∶1,均高于其它覆盖栽培模式。
The necessary condition on the weight is similar to the Ap condition but involves rectangles (instead of cubes) arising from a covering of a star-shaped set related to Ω.
The analyticity of functions from the RKHS enables us to derive some estimates for the covering numbers which form an essential part for the analysis of some algorithms in learning theory.
The relations among the dominating number, independence number and covering number of hypergraphs are investigated.
In this approach, PNIPAM network was formed by radical polymerization covering PCL particles.
In this method the uncertainty of the system to be controlled was normalized firstly, and then the partition of unity that was subordinated to an open covering of state variables compact set was constructed.
The efficiency of traditional agrotechnical practices (autumn treatment of soil and its mulching with plant residues (straw)) for the control of the hydrological cycle on small catchment areas during spring snow melting is assessed.
Measurements of N2O emissions from conventional rice cultivation (CRC), CRC with straw mulching, system of rice intensification (SRI) and SRI with plastic film mulching were conducted through static chamber/gas-chromatography techniques.
The results showed that after jointing stage the average N2O emission flux of SRI with plastic film mulching increased significantly than CRC with straw mulching and SRI, the leaf stomatal conductance of those showed the same trend (P>amp;lt;0.05).
Yield and total quantity of N2O emission in CRC with straw mulching enhanced 13.7% and 10.7% compared with those of CRC, respectively.
The total quantity of N2O emissions reduced 3.6% in SRI with plastic film mulching compared with CRC, however, the yield increase of that was not significant.